/export/starexec/sandbox/solver/bin/starexec_run_default /export/starexec/sandbox/benchmark/theBenchmark.c /export/starexec/sandbox/output/output_files -------------------------------------------------------------------------------- MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.25-34f2e62 [2020-07-01 12:34:22,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-01 12:34:22,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-01 12:34:22,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-01 12:34:22,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-01 12:34:22,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-01 12:34:22,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-01 12:34:22,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-01 12:34:22,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-01 12:34:22,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-01 12:34:22,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-01 12:34:22,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-01 12:34:22,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-01 12:34:22,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-01 12:34:22,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-01 12:34:22,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-01 12:34:22,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-01 12:34:22,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-01 12:34:22,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-01 12:34:22,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-01 12:34:22,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-01 12:34:22,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-01 12:34:22,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-01 12:34:22,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-01 12:34:22,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-01 12:34:22,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-01 12:34:22,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-01 12:34:22,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-01 12:34:22,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-01 12:34:22,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-01 12:34:22,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-01 12:34:22,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-01 12:34:22,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-01 12:34:22,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-01 12:34:22,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-01 12:34:22,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-01 12:34:22,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-01 12:34:22,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-01 12:34:22,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-01 12:34:22,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-01 12:34:22,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-01 12:34:22,564 INFO L101 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-07-01 12:34:22,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-01 12:34:22,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-01 12:34:22,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-01 12:34:22,580 INFO L138 SettingsManager]: * Rewrite not-equals=true [2020-07-01 12:34:22,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-01 12:34:22,580 INFO L138 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:34:22,580 INFO L138 SettingsManager]: * Use SBE=true [2020-07-01 12:34:22,581 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-01 12:34:22,581 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-01 12:34:22,581 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-01 12:34:22,581 INFO L138 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-07-01 12:34:22,581 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-01 12:34:22,581 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-01 12:34:22,582 INFO L138 SettingsManager]: * Construct termination proof for TermComp=true [2020-07-01 12:34:22,582 INFO L138 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-07-01 12:34:22,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-01 12:34:22,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-01 12:34:22,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-01 12:34:22,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-01 12:34:22,583 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-01 12:34:22,583 INFO L138 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-07-01 12:34:22,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-01 12:34:22,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-01 12:34:22,584 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-01 12:34:22,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 12:34:22,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-01 12:34:22,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-01 12:34:22,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-01 12:34:22,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-01 12:34:22,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-01 12:34:22,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-01 12:34:22,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-01 12:34:22,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-01 12:34:22,766 INFO L275 PluginConnector]: CDTParser initialized [2020-07-01 12:34:22,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:34:22,876 INFO L220 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_T8eEHj/tmp/ab410c0ffd824cf1a12ab19c919a6893/FLAGe5a160619 [2020-07-01 12:34:23,233 INFO L306 CDTParser]: Found 1 translation units. [2020-07-01 12:34:23,234 INFO L160 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:34:23,234 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-07-01 12:34:23,241 INFO L349 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_T8eEHj/tmp/ab410c0ffd824cf1a12ab19c919a6893/FLAGe5a160619 [2020-07-01 12:34:23,619 INFO L357 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/BenchExec_run_T8eEHj/tmp/ab410c0ffd824cf1a12ab19c919a6893 [2020-07-01 12:34:23,630 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-01 12:34:23,632 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-07-01 12:34:23,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-01 12:34:23,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-01 12:34:23,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-01 12:34:23,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:23,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569632dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23, skipping insertion in model container [2020-07-01 12:34:23,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:23,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-01 12:34:23,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-01 12:34:23,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:34:23,917 INFO L203 MainTranslator]: Completed pre-run [2020-07-01 12:34:23,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:34:23,954 INFO L208 MainTranslator]: Completed translation [2020-07-01 12:34:23,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23 WrapperNode [2020-07-01 12:34:23,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-01 12:34:23,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-01 12:34:23,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-01 12:34:23,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-01 12:34:23,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:23,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:23,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-01 12:34:24,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-01 12:34:24,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-01 12:34:24,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-01 12:34:24,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:24,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:24,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:24,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:24,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:24,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:24,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... [2020-07-01 12:34:24,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-01 12:34:24,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-01 12:34:24,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-01 12:34:24,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-01 12:34:24,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (1/1) ... No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 12:34:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-01 12:34:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-01 12:34:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-01 12:34:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-01 12:34:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-01 12:34:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-01 12:34:24,462 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-01 12:34:24,463 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-07-01 12:34:24,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:34:24 BoogieIcfgContainer [2020-07-01 12:34:24,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-01 12:34:24,468 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-07-01 12:34:24,468 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-07-01 12:34:24,470 INFO L275 PluginConnector]: BlockEncodingV2 initialized [2020-07-01 12:34:24,471 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:34:24" (1/1) ... [2020-07-01 12:34:24,488 INFO L313 BlockEncoder]: Initial Icfg 57 locations, 67 edges [2020-07-01 12:34:24,489 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-07-01 12:34:24,490 INFO L263 BlockEncoder]: Using Maximize final states [2020-07-01 12:34:24,490 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-07-01 12:34:24,491 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:34:24,493 INFO L296 BlockEncoder]: Using Remove sink states [2020-07-01 12:34:24,494 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-07-01 12:34:24,494 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-07-01 12:34:24,521 INFO L185 BlockEncoder]: Using Use SBE [2020-07-01 12:34:24,554 INFO L200 BlockEncoder]: SBE split 25 edges [2020-07-01 12:34:24,559 INFO L70 emoveInfeasibleEdges]: Removed 4 edges and 0 locations because of local infeasibility [2020-07-01 12:34:24,561 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:34:24,602 INFO L100 BaseMinimizeStates]: Removed 20 edges and 10 locations by large block encoding [2020-07-01 12:34:24,605 INFO L70 RemoveSinkStates]: Removed 1 edges and 1 locations by removing sink states [2020-07-01 12:34:24,607 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-07-01 12:34:24,607 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:34:24,607 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-07-01 12:34:24,608 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-07-01 12:34:24,608 INFO L313 BlockEncoder]: Encoded RCFG 46 locations, 79 edges [2020-07-01 12:34:24,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:34:24 BasicIcfg [2020-07-01 12:34:24,609 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-07-01 12:34:24,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-01 12:34:24,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-01 12:34:24,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-01 12:34:24,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.07 12:34:23" (1/4) ... [2020-07-01 12:34:24,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f943f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:34:24, skipping insertion in model container [2020-07-01 12:34:24,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:34:23" (2/4) ... [2020-07-01 12:34:24,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f943f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:34:24, skipping insertion in model container [2020-07-01 12:34:24,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:34:24" (3/4) ... [2020-07-01 12:34:24,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f943f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:34:24, skipping insertion in model container [2020-07-01 12:34:24,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:34:24" (4/4) ... [2020-07-01 12:34:24,618 INFO L109 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 12:34:24,628 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-07-01 12:34:24,636 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-07-01 12:34:24,650 INFO L251 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-07-01 12:34:24,673 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-01 12:34:24,674 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-01 12:34:24,674 INFO L377 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 12:34:24,674 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 12:34:24,674 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 12:34:24,674 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-01 12:34:24,674 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 12:34:24,675 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-01 12:34:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-07-01 12:34:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-07-01 12:34:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:24,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-07-01 12:34:24,711 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:24,717 INFO L82 PathProgramCache]: Analyzing trace with hash 5480954, now seen corresponding path program 1 times [2020-07-01 12:34:24,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:24,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351986992] [2020-07-01 12:34:24,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:24,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351986992] [2020-07-01 12:34:24,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:24,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:34:24,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193685811] [2020-07-01 12:34:24,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:34:24,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:24,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:34:24,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:24,940 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-07-01 12:34:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:25,127 INFO L93 Difference]: Finished difference Result 46 states and 79 transitions. [2020-07-01 12:34:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:34:25,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-07-01 12:34:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:25,143 INFO L225 Difference]: With dead ends: 46 [2020-07-01 12:34:25,143 INFO L226 Difference]: Without dead ends: 39 [2020-07-01 12:34:25,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-01 12:34:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-01 12:34:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-01 12:34:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 65 transitions. [2020-07-01 12:34:25,186 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 65 transitions. Word has length 4 [2020-07-01 12:34:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:25,187 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 65 transitions. [2020-07-01 12:34:25,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:34:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 65 transitions. [2020-07-01 12:34:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-07-01 12:34:25,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:25,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-07-01 12:34:25,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-01 12:34:25,190 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash 5480956, now seen corresponding path program 1 times [2020-07-01 12:34:25,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:25,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755840437] [2020-07-01 12:34:25,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:25,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755840437] [2020-07-01 12:34:25,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:25,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:34:25,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046670322] [2020-07-01 12:34:25,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:34:25,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:25,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:34:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:25,227 INFO L87 Difference]: Start difference. First operand 39 states and 65 transitions. Second operand 3 states. [2020-07-01 12:34:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:25,380 INFO L93 Difference]: Finished difference Result 46 states and 75 transitions. [2020-07-01 12:34:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:34:25,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-07-01 12:34:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:25,382 INFO L225 Difference]: With dead ends: 46 [2020-07-01 12:34:25,382 INFO L226 Difference]: Without dead ends: 45 [2020-07-01 12:34:25,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-01 12:34:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-01 12:34:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-01 12:34:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 69 transitions. [2020-07-01 12:34:25,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 69 transitions. Word has length 4 [2020-07-01 12:34:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:25,391 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 69 transitions. [2020-07-01 12:34:25,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:34:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 69 transitions. [2020-07-01 12:34:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-07-01 12:34:25,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:25,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-07-01 12:34:25,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-01 12:34:25,392 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:25,393 INFO L82 PathProgramCache]: Analyzing trace with hash 5480957, now seen corresponding path program 1 times [2020-07-01 12:34:25,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:25,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243163338] [2020-07-01 12:34:25,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:25,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243163338] [2020-07-01 12:34:25,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:25,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 12:34:25,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952415051] [2020-07-01 12:34:25,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 12:34:25,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:25,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 12:34:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-01 12:34:25,446 INFO L87 Difference]: Start difference. First operand 41 states and 69 transitions. Second operand 4 states. [2020-07-01 12:34:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:25,583 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2020-07-01 12:34:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:34:25,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-07-01 12:34:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:25,585 INFO L225 Difference]: With dead ends: 46 [2020-07-01 12:34:25,585 INFO L226 Difference]: Without dead ends: 41 [2020-07-01 12:34:25,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 12:34:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-01 12:34:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-01 12:34:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-01 12:34:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 63 transitions. [2020-07-01 12:34:25,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 63 transitions. Word has length 4 [2020-07-01 12:34:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:25,592 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 63 transitions. [2020-07-01 12:34:25,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 12:34:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 63 transitions. [2020-07-01 12:34:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-01 12:34:25,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:25,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-01 12:34:25,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-01 12:34:25,593 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 169907159, now seen corresponding path program 1 times [2020-07-01 12:34:25,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:25,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80436398] [2020-07-01 12:34:25,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:25,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80436398] [2020-07-01 12:34:25,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:25,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:34:25,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505994208] [2020-07-01 12:34:25,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:34:25,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:34:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:25,630 INFO L87 Difference]: Start difference. First operand 41 states and 63 transitions. Second operand 3 states. [2020-07-01 12:34:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:25,711 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2020-07-01 12:34:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:34:25,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-07-01 12:34:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:25,713 INFO L225 Difference]: With dead ends: 41 [2020-07-01 12:34:25,713 INFO L226 Difference]: Without dead ends: 39 [2020-07-01 12:34:25,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-01 12:34:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-01 12:34:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-01 12:34:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2020-07-01 12:34:25,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 5 [2020-07-01 12:34:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:25,720 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2020-07-01 12:34:25,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:34:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2020-07-01 12:34:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-01 12:34:25,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:25,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-01 12:34:25,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-01 12:34:25,722 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:25,722 INFO L82 PathProgramCache]: Analyzing trace with hash 169907161, now seen corresponding path program 1 times [2020-07-01 12:34:25,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:25,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751215348] [2020-07-01 12:34:25,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:25,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751215348] [2020-07-01 12:34:25,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:25,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-01 12:34:25,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597030857] [2020-07-01 12:34:25,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 12:34:25,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:25,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 12:34:25,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-01 12:34:25,781 INFO L87 Difference]: Start difference. First operand 39 states and 59 transitions. Second operand 4 states. [2020-07-01 12:34:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:25,895 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2020-07-01 12:34:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:34:25,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-07-01 12:34:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:25,897 INFO L225 Difference]: With dead ends: 41 [2020-07-01 12:34:25,897 INFO L226 Difference]: Without dead ends: 39 [2020-07-01 12:34:25,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 12:34:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-01 12:34:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-01 12:34:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-01 12:34:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2020-07-01 12:34:25,904 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 5 [2020-07-01 12:34:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:25,904 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2020-07-01 12:34:25,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 12:34:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2020-07-01 12:34:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-01 12:34:25,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:25,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-01 12:34:25,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-01 12:34:25,905 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash 169907162, now seen corresponding path program 1 times [2020-07-01 12:34:25,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:25,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431340740] [2020-07-01 12:34:25,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:25,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431340740] [2020-07-01 12:34:25,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:25,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:34:25,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389508500] [2020-07-01 12:34:25,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:34:25,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:34:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:25,946 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand 3 states. [2020-07-01 12:34:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:26,049 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2020-07-01 12:34:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:34:26,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-07-01 12:34:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:26,050 INFO L225 Difference]: With dead ends: 41 [2020-07-01 12:34:26,051 INFO L226 Difference]: Without dead ends: 40 [2020-07-01 12:34:26,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:34:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-01 12:34:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-01 12:34:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-01 12:34:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2020-07-01 12:34:26,057 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 5 [2020-07-01 12:34:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:26,057 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2020-07-01 12:34:26,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:34:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2020-07-01 12:34:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:34:26,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:26,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:34:26,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-01 12:34:26,058 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash 976221499, now seen corresponding path program 1 times [2020-07-01 12:34:26,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:26,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181277278] [2020-07-01 12:34:26,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:26,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181277278] [2020-07-01 12:34:26,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:26,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-01 12:34:26,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340687443] [2020-07-01 12:34:26,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 12:34:26,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 12:34:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-01 12:34:26,098 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 4 states. [2020-07-01 12:34:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:26,216 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-01 12:34:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:34:26,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-07-01 12:34:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:26,218 INFO L225 Difference]: With dead ends: 78 [2020-07-01 12:34:26,218 INFO L226 Difference]: Without dead ends: 48 [2020-07-01 12:34:26,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-01 12:34:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-01 12:34:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-01 12:34:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-01 12:34:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2020-07-01 12:34:26,224 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 6 [2020-07-01 12:34:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:26,224 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2020-07-01 12:34:26,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 12:34:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2020-07-01 12:34:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:34:26,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:26,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:34:26,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-01 12:34:26,226 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 976303376, now seen corresponding path program 1 times [2020-07-01 12:34:26,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:26,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244911121] [2020-07-01 12:34:26,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:26,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244911121] [2020-07-01 12:34:26,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:34:26,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-01 12:34:26,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000848332] [2020-07-01 12:34:26,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 12:34:26,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 12:34:26,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 12:34:26,265 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand 5 states. [2020-07-01 12:34:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:26,377 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2020-07-01 12:34:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 12:34:26,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-07-01 12:34:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:26,378 INFO L225 Difference]: With dead ends: 56 [2020-07-01 12:34:26,378 INFO L226 Difference]: Without dead ends: 47 [2020-07-01 12:34:26,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 12:34:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-01 12:34:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-01 12:34:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-01 12:34:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2020-07-01 12:34:26,384 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 6 [2020-07-01 12:34:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:26,385 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2020-07-01 12:34:26,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 12:34:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2020-07-01 12:34:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-01 12:34:26,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:26,385 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-07-01 12:34:26,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-01 12:34:26,386 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:26,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:26,386 INFO L82 PathProgramCache]: Analyzing trace with hash 72070013, now seen corresponding path program 1 times [2020-07-01 12:34:26,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:26,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383486610] [2020-07-01 12:34:26,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:26,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383486610] [2020-07-01 12:34:26,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672448990] [2020-07-01 12:34:26,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:34:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:26,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-01 12:34:26,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:34:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:26,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-01 12:34:26,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-07-01 12:34:26,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378410472] [2020-07-01 12:34:26,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 12:34:26,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:26,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 12:34:26,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-01 12:34:26,539 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand 4 states. [2020-07-01 12:34:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:26,635 INFO L93 Difference]: Finished difference Result 45 states and 65 transitions. [2020-07-01 12:34:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:34:26,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-07-01 12:34:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:26,637 INFO L225 Difference]: With dead ends: 45 [2020-07-01 12:34:26,637 INFO L226 Difference]: Without dead ends: 30 [2020-07-01 12:34:26,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-01 12:34:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-01 12:34:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-01 12:34:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-01 12:34:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 45 transitions. [2020-07-01 12:34:26,642 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 45 transitions. Word has length 7 [2020-07-01 12:34:26,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:26,642 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 45 transitions. [2020-07-01 12:34:26,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 12:34:26,642 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 45 transitions. [2020-07-01 12:34:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-01 12:34:26,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:26,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-07-01 12:34:26,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-01 12:34:26,844 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2060799367, now seen corresponding path program 1 times [2020-07-01 12:34:26,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:26,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111432083] [2020-07-01 12:34:26,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:26,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111432083] [2020-07-01 12:34:26,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658135031] [2020-07-01 12:34:26,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:34:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:26,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-01 12:34:26,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:34:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:26,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-01 12:34:26,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-07-01 12:34:26,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244194970] [2020-07-01 12:34:26,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 12:34:26,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 12:34:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-01 12:34:26,945 INFO L87 Difference]: Start difference. First operand 30 states and 45 transitions. Second operand 4 states. [2020-07-01 12:34:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:26,997 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2020-07-01 12:34:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:34:26,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-07-01 12:34:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:26,998 INFO L225 Difference]: With dead ends: 30 [2020-07-01 12:34:26,999 INFO L226 Difference]: Without dead ends: 28 [2020-07-01 12:34:26,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-01 12:34:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-01 12:34:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-01 12:34:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-01 12:34:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 41 transitions. [2020-07-01 12:34:27,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 41 transitions. Word has length 8 [2020-07-01 12:34:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:27,003 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 41 transitions. [2020-07-01 12:34:27,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 12:34:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 41 transitions. [2020-07-01 12:34:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-07-01 12:34:27,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:27,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:34:27,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-01 12:34:27,206 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash 543795836, now seen corresponding path program 1 times [2020-07-01 12:34:27,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:27,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542142039] [2020-07-01 12:34:27,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:27,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542142039] [2020-07-01 12:34:27,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840133389] [2020-07-01 12:34:27,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:34:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:34:27,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-01 12:34:27,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:34:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-01 12:34:27,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-01 12:34:27,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-01 12:34:27,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233608208] [2020-07-01 12:34:27,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-01 12:34:27,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:34:27,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-01 12:34:27,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-01 12:34:27,298 INFO L87 Difference]: Start difference. First operand 26 states and 41 transitions. Second operand 7 states. [2020-07-01 12:34:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:34:27,427 INFO L93 Difference]: Finished difference Result 72 states and 110 transitions. [2020-07-01 12:34:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 12:34:27,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-07-01 12:34:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:34:27,428 INFO L225 Difference]: With dead ends: 72 [2020-07-01 12:34:27,428 INFO L226 Difference]: Without dead ends: 51 [2020-07-01 12:34:27,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-01 12:34:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-01 12:34:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2020-07-01 12:34:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-01 12:34:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2020-07-01 12:34:27,434 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 9 [2020-07-01 12:34:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:34:27,434 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2020-07-01 12:34:27,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-01 12:34:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2020-07-01 12:34:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-01 12:34:27,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:34:27,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-07-01 12:34:27,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-01 12:34:27,636 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:34:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:34:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1242209893, now seen corresponding path program 2 times [2020-07-01 12:34:27,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:34:27,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094492061] [2020-07-01 12:34:27,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:34:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:34:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:34:27,689 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-01 12:34:27,689 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-01 12:34:27,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-01 12:34:27,719 INFO L308 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-07-01 12:34:27,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:34:27 BasicIcfg [2020-07-01 12:34:27,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-01 12:34:27,723 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-01 12:34:27,723 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-01 12:34:27,726 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-01 12:34:27,727 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:34:27,727 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:34:27,727 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:34:27,727 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:34:27,727 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:34:27,727 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-07-01 12:34:27,730 INFO L168 Benchmark]: Toolchain (without parser) took 4097.14 ms. Allocated memory was 649.6 MB in the beginning and 752.9 MB in the end (delta: 103.3 MB). Free memory was 556.1 MB in the beginning and 589.4 MB in the end (delta: -33.3 MB). Peak memory consumption was 70.0 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,730 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 577.9 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 12:34:27,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.43 ms. Allocated memory was 649.6 MB in the beginning and 690.0 MB in the end (delta: 40.4 MB). Free memory was 556.1 MB in the beginning and 651.4 MB in the end (delta: -95.3 MB). Peak memory consumption was 28.2 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,731 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.70 ms. Allocated memory is still 690.0 MB. Free memory was 651.4 MB in the beginning and 649.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,732 INFO L168 Benchmark]: Boogie Preprocessor took 30.11 ms. Allocated memory is still 690.0 MB. Free memory was 649.3 MB in the beginning and 647.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,733 INFO L168 Benchmark]: RCFGBuilder took 437.10 ms. Allocated memory is still 690.0 MB. Free memory was 647.1 MB in the beginning and 617.3 MB in the end (delta: 29.8 MB). Peak memory consumption was 29.8 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,733 INFO L168 Benchmark]: BlockEncodingV2 took 141.01 ms. Allocated memory is still 690.0 MB. Free memory was 617.3 MB in the beginning and 605.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,734 INFO L168 Benchmark]: TraceAbstraction took 3112.16 ms. Allocated memory was 690.0 MB in the beginning and 752.9 MB in the end (delta: 62.9 MB). Free memory was 604.3 MB in the beginning and 593.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 74.0 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,734 INFO L168 Benchmark]: BuchiAutomizer took 4.45 ms. Allocated memory is still 752.9 MB. Free memory was 593.2 MB in the beginning and 589.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 50.3 GB. [2020-07-01 12:34:27,738 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 57 locations, 67 edges - StatisticsResult: Encoded RCFG 46 locations, 79 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 577.9 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 322.43 ms. Allocated memory was 649.6 MB in the beginning and 690.0 MB in the end (delta: 40.4 MB). Free memory was 556.1 MB in the beginning and 651.4 MB in the end (delta: -95.3 MB). Peak memory consumption was 28.2 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 43.70 ms. Allocated memory is still 690.0 MB. Free memory was 651.4 MB in the beginning and 649.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 30.11 ms. Allocated memory is still 690.0 MB. Free memory was 649.3 MB in the beginning and 647.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. * RCFGBuilder took 437.10 ms. Allocated memory is still 690.0 MB. Free memory was 647.1 MB in the beginning and 617.3 MB in the end (delta: 29.8 MB). Peak memory consumption was 29.8 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 141.01 ms. Allocated memory is still 690.0 MB. Free memory was 617.3 MB in the beginning and 605.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 50.3 GB. * TraceAbstraction took 3112.16 ms. Allocated memory was 690.0 MB in the beginning and 752.9 MB in the end (delta: 62.9 MB). Free memory was 604.3 MB in the beginning and 593.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 74.0 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 4.45 ms. Allocated memory is still 752.9 MB. Free memory was 593.2 MB in the beginning and 589.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L33] int *a; [L34] int N = __VERIFIER_nondet_int(); [L10] int *best, *prev, i, j, max = 0; [L11] best = (int*) malloc(sizeof(int) * N) [L12] prev = (int*) malloc(sizeof(int) * N) [L14] i = 0 [L14] COND TRUE i < N [L15] best[i] = 1 [L15] prev[i] = i [L14] i++ [L14] COND TRUE i < N [L15] best[i] = 1 [L15] prev[i] = i [L14] i++ [L14] COND FALSE !(i < N) [L17] i = 1 [L17] COND TRUE i < N [L18] j = 0 [L18] COND TRUE j < i [L19] a[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 12, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 425 SDslu, 261 SDs, 0 SdLazy, 857 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 42 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 1983 SizeOfPredicates, 4 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 14 InterpolantComputations, 10 PerfectInterpolantSequences, 5/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! !SESSION 2020-07-01 12:34:20.312 ----------------------------------------------- eclipse.buildId=unknown java.version=1.8.0_242 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -i /export/starexec/sandbox/benchmark/theBenchmark.c Command-line arguments: -os linux -ws gtk -arch x86_64 -consoleLog -data @user.home/.ultimate -tc ./../AutomizerAndBuchiAutomizerCInlineWithBlockEncoding.xml -s ./../termcomp2017.epf -data /export/starexec/sandbox/tmp/BenchExec_run_T8eEHj/tmp -i /export/starexec/sandbox/benchmark/theBenchmark.c !ENTRY org.eclipse.core.resources 2 10035 2020-07-01 12:34:27.972 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check