/export/starexec/sandbox2/solver/bin/starexec_run_default /export/starexec/sandbox2/benchmark/theBenchmark.c /export/starexec/sandbox2/output/output_files -------------------------------------------------------------------------------- MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.25-34f2e62 [2020-07-01 13:06:22,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-01 13:06:22,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-01 13:06:22,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-01 13:06:22,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-01 13:06:22,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-01 13:06:22,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-01 13:06:22,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-01 13:06:22,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-01 13:06:22,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-01 13:06:22,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-01 13:06:22,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-01 13:06:22,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-01 13:06:22,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-01 13:06:22,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-01 13:06:22,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-01 13:06:22,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-01 13:06:22,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-01 13:06:22,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-01 13:06:22,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-01 13:06:22,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-01 13:06:22,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-01 13:06:22,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-01 13:06:22,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-01 13:06:22,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-01 13:06:22,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-01 13:06:22,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-01 13:06:22,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-01 13:06:22,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-01 13:06:22,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-01 13:06:22,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-01 13:06:22,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-01 13:06:22,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-01 13:06:22,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-01 13:06:22,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-01 13:06:22,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-01 13:06:22,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-01 13:06:22,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-01 13:06:22,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-01 13:06:22,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-01 13:06:22,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-01 13:06:22,462 INFO L101 SettingsManager]: Beginning loading settings from /export/starexec/sandbox2/solver/bin/./../termcomp2017.epf [2020-07-01 13:06:22,476 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-01 13:06:22,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-01 13:06:22,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-01 13:06:22,478 INFO L138 SettingsManager]: * Rewrite not-equals=true [2020-07-01 13:06:22,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-01 13:06:22,478 INFO L138 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-07-01 13:06:22,478 INFO L138 SettingsManager]: * Use SBE=true [2020-07-01 13:06:22,478 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-01 13:06:22,479 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-01 13:06:22,479 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-01 13:06:22,479 INFO L138 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-07-01 13:06:22,479 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-01 13:06:22,479 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-01 13:06:22,479 INFO L138 SettingsManager]: * Construct termination proof for TermComp=true [2020-07-01 13:06:22,480 INFO L138 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-07-01 13:06:22,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-01 13:06:22,480 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-01 13:06:22,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-01 13:06:22,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-01 13:06:22,480 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-01 13:06:22,481 INFO L138 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-07-01 13:06:22,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-01 13:06:22,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-01 13:06:22,481 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-01 13:06:22,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 13:06:22,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-01 13:06:22,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-01 13:06:22,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-01 13:06:22,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-01 13:06:22,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-01 13:06:22,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-01 13:06:22,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-01 13:06:22,665 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-01 13:06:22,666 INFO L275 PluginConnector]: CDTParser initialized [2020-07-01 13:06:22,667 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-07-01 13:06:22,736 INFO L220 CDTParser]: Created temporary CDT project at /export/starexec/sandbox2/tmp/BenchExec_run_jlTt72/tmp/c48dbeef03d441ad81b007fceb8a9240/FLAG7e76e172e [2020-07-01 13:06:23,069 INFO L306 CDTParser]: Found 1 translation units. [2020-07-01 13:06:23,070 INFO L160 CDTParser]: Scanning /export/starexec/sandbox2/benchmark/theBenchmark.c [2020-07-01 13:06:23,070 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-07-01 13:06:23,077 INFO L349 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox2/tmp/BenchExec_run_jlTt72/tmp/c48dbeef03d441ad81b007fceb8a9240/FLAG7e76e172e [2020-07-01 13:06:23,481 INFO L357 CDTParser]: Successfully deleted /export/starexec/sandbox2/tmp/BenchExec_run_jlTt72/tmp/c48dbeef03d441ad81b007fceb8a9240 [2020-07-01 13:06:23,492 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-01 13:06:23,494 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-07-01 13:06:23,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-01 13:06:23,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-01 13:06:23,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-01 13:06:23,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e8a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23, skipping insertion in model container [2020-07-01 13:06:23,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-01 13:06:23,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-01 13:06:23,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 13:06:23,778 INFO L203 MainTranslator]: Completed pre-run [2020-07-01 13:06:23,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 13:06:23,811 INFO L208 MainTranslator]: Completed translation [2020-07-01 13:06:23,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23 WrapperNode [2020-07-01 13:06:23,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-01 13:06:23,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-01 13:06:23,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-01 13:06:23,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-01 13:06:23,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-01 13:06:23,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-01 13:06:23,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-01 13:06:23,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-01 13:06:23,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... [2020-07-01 13:06:23,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-01 13:06:23,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-01 13:06:23,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-01 13:06:23,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-01 13:06:23,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (1/1) ... No working directory specified, using /export/starexec/sandbox2/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 13:06:23,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-01 13:06:23,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-01 13:06:23,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-01 13:06:23,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-01 13:06:23,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-01 13:06:24,173 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-01 13:06:24,173 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-01 13:06:24,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 01:06:24 BoogieIcfgContainer [2020-07-01 13:06:24,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-01 13:06:24,177 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-07-01 13:06:24,178 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-07-01 13:06:24,180 INFO L275 PluginConnector]: BlockEncodingV2 initialized [2020-07-01 13:06:24,180 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 01:06:24" (1/1) ... [2020-07-01 13:06:24,194 INFO L313 BlockEncoder]: Initial Icfg 18 locations, 23 edges [2020-07-01 13:06:24,230 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-07-01 13:06:24,231 INFO L263 BlockEncoder]: Using Maximize final states [2020-07-01 13:06:24,231 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-07-01 13:06:24,232 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-07-01 13:06:24,234 INFO L296 BlockEncoder]: Using Remove sink states [2020-07-01 13:06:24,235 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-07-01 13:06:24,235 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-07-01 13:06:24,255 INFO L185 BlockEncoder]: Using Use SBE [2020-07-01 13:06:24,279 INFO L200 BlockEncoder]: SBE split 6 edges [2020-07-01 13:06:24,284 INFO L70 emoveInfeasibleEdges]: Removed 1 edges and 0 locations because of local infeasibility [2020-07-01 13:06:24,285 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 13:06:24,298 INFO L100 BaseMinimizeStates]: Removed 6 edges and 3 locations by large block encoding [2020-07-01 13:06:24,300 INFO L70 RemoveSinkStates]: Removed 5 edges and 3 locations by removing sink states [2020-07-01 13:06:24,302 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-07-01 13:06:24,302 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 13:06:24,302 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-07-01 13:06:24,303 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-07-01 13:06:24,303 INFO L313 BlockEncoder]: Encoded RCFG 12 locations, 20 edges [2020-07-01 13:06:24,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 01:06:24 BasicIcfg [2020-07-01 13:06:24,304 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-07-01 13:06:24,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-01 13:06:24,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-01 13:06:24,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-01 13:06:24,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.07 01:06:23" (1/4) ... [2020-07-01 13:06:24,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4969569c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 01:06:24, skipping insertion in model container [2020-07-01 13:06:24,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 01:06:23" (2/4) ... [2020-07-01 13:06:24,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4969569c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 01:06:24, skipping insertion in model container [2020-07-01 13:06:24,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 01:06:24" (3/4) ... [2020-07-01 13:06:24,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4969569c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 01:06:24, skipping insertion in model container [2020-07-01 13:06:24,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 01:06:24" (4/4) ... [2020-07-01 13:06:24,313 INFO L109 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 13:06:24,323 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-07-01 13:06:24,330 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-01 13:06:24,344 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-01 13:06:24,366 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-01 13:06:24,367 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-01 13:06:24,367 INFO L377 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 13:06:24,367 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 13:06:24,367 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 13:06:24,367 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-01 13:06:24,367 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 13:06:24,368 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-01 13:06:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-07-01 13:06:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-01 13:06:24,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:06:24,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:06:24,389 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-07-01 13:06:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:06:24,395 INFO L82 PathProgramCache]: Analyzing trace with hash 520829245, now seen corresponding path program 1 times [2020-07-01 13:06:24,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:06:24,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716747080] [2020-07-01 13:06:24,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:06:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:06:24,566 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 13:06:24,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716747080] [2020-07-01 13:06:24,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:06:24,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 13:06:24,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930642773] [2020-07-01 13:06:24,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 13:06:24,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:06:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 13:06:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 13:06:24,592 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-07-01 13:06:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:06:24,651 INFO L93 Difference]: Finished difference Result 20 states and 33 transitions. [2020-07-01 13:06:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 13:06:24,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-07-01 13:06:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:06:24,666 INFO L225 Difference]: With dead ends: 20 [2020-07-01 13:06:24,666 INFO L226 Difference]: Without dead ends: 12 [2020-07-01 13:06:24,670 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 13:06:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-01 13:06:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-01 13:06:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-01 13:06:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 19 transitions. [2020-07-01 13:06:24,705 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 19 transitions. Word has length 7 [2020-07-01 13:06:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:06:24,706 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 19 transitions. [2020-07-01 13:06:24,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 13:06:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 19 transitions. [2020-07-01 13:06:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-01 13:06:24,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:06:24,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:06:24,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-01 13:06:24,709 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-07-01 13:06:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:06:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash 520859036, now seen corresponding path program 1 times [2020-07-01 13:06:24,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:06:24,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213579505] [2020-07-01 13:06:24,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:06:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:06:24,766 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 13:06:24,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213579505] [2020-07-01 13:06:24,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:06:24,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-01 13:06:24,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893025400] [2020-07-01 13:06:24,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-01 13:06:24,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:06:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-01 13:06:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-01 13:06:24,770 INFO L87 Difference]: Start difference. First operand 12 states and 19 transitions. Second operand 4 states. [2020-07-01 13:06:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:06:24,840 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2020-07-01 13:06:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 13:06:24,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-07-01 13:06:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:06:24,841 INFO L225 Difference]: With dead ends: 25 [2020-07-01 13:06:24,841 INFO L226 Difference]: Without dead ends: 18 [2020-07-01 13:06:24,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 13:06:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-01 13:06:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2020-07-01 13:06:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-01 13:06:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2020-07-01 13:06:24,846 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 18 transitions. Word has length 7 [2020-07-01 13:06:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:06:24,846 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 18 transitions. [2020-07-01 13:06:24,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-01 13:06:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 18 transitions. [2020-07-01 13:06:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-01 13:06:24,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:06:24,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:06:24,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-01 13:06:24,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-07-01 13:06:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:06:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash 520859997, now seen corresponding path program 1 times [2020-07-01 13:06:24,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:06:24,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872970386] [2020-07-01 13:06:24,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:06:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:06:24,908 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 13:06:24,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872970386] [2020-07-01 13:06:24,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:06:24,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-01 13:06:24,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988404394] [2020-07-01 13:06:24,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 13:06:24,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:06:24,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 13:06:24,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-01 13:06:24,911 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. Second operand 5 states. [2020-07-01 13:06:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:06:24,999 INFO L93 Difference]: Finished difference Result 12 states and 18 transitions. [2020-07-01 13:06:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 13:06:25,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-07-01 13:06:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:06:25,000 INFO L225 Difference]: With dead ends: 12 [2020-07-01 13:06:25,001 INFO L226 Difference]: Without dead ends: 11 [2020-07-01 13:06:25,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-01 13:06:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-07-01 13:06:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-07-01 13:06:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-07-01 13:06:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2020-07-01 13:06:25,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 16 transitions. Word has length 7 [2020-07-01 13:06:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:06:25,004 INFO L479 AbstractCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-07-01 13:06:25,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 13:06:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 16 transitions. [2020-07-01 13:06:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-01 13:06:25,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:06:25,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:06:25,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-01 13:06:25,006 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-07-01 13:06:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:06:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash 520859999, now seen corresponding path program 1 times [2020-07-01 13:06:25,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:06:25,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171980] [2020-07-01 13:06:25,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:06:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:06:25,125 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 13:06:25,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171980] [2020-07-01 13:06:25,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:06:25,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-01 13:06:25,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495579776] [2020-07-01 13:06:25,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-01 13:06:25,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:06:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-01 13:06:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-01 13:06:25,127 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 6 states. [2020-07-01 13:06:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:06:25,293 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2020-07-01 13:06:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-01 13:06:25,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-07-01 13:06:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:06:25,295 INFO L225 Difference]: With dead ends: 17 [2020-07-01 13:06:25,295 INFO L226 Difference]: Without dead ends: 16 [2020-07-01 13:06:25,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-01 13:06:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-01 13:06:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-07-01 13:06:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-07-01 13:06:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2020-07-01 13:06:25,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2020-07-01 13:06:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:06:25,299 INFO L479 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-07-01 13:06:25,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-01 13:06:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2020-07-01 13:06:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-01 13:06:25,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:06:25,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:06:25,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-01 13:06:25,300 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-07-01 13:06:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:06:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash 520860000, now seen corresponding path program 1 times [2020-07-01 13:06:25,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:06:25,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911970820] [2020-07-01 13:06:25,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:06:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 13:06:25,378 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 13:06:25,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911970820] [2020-07-01 13:06:25,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 13:06:25,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-01 13:06:25,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916820582] [2020-07-01 13:06:25,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-01 13:06:25,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 13:06:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-01 13:06:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-01 13:06:25,380 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand 6 states. [2020-07-01 13:06:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 13:06:25,536 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2020-07-01 13:06:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-01 13:06:25,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-07-01 13:06:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 13:06:25,537 INFO L225 Difference]: With dead ends: 22 [2020-07-01 13:06:25,537 INFO L226 Difference]: Without dead ends: 21 [2020-07-01 13:06:25,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-01 13:06:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-01 13:06:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-01 13:06:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-01 13:06:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-07-01 13:06:25,544 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2020-07-01 13:06:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 13:06:25,544 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-07-01 13:06:25,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-01 13:06:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-07-01 13:06:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-01 13:06:25,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 13:06:25,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-07-01 13:06:25,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-01 13:06:25,545 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2020-07-01 13:06:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 13:06:25,546 INFO L82 PathProgramCache]: Analyzing trace with hash 542100983, now seen corresponding path program 1 times [2020-07-01 13:06:25,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 13:06:25,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071450955] [2020-07-01 13:06:25,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 13:06:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 13:06:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 13:06:25,594 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-01 13:06:25,595 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-01 13:06:25,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-01 13:06:25,617 INFO L308 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-07-01 13:06:25,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 01:06:25 BasicIcfg [2020-07-01 13:06:25,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-01 13:06:25,621 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-01 13:06:25,621 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-01 13:06:25,624 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-01 13:06:25,624 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 13:06:25,625 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 13:06:25,625 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 13:06:25,625 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 13:06:25,625 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 13:06:25,625 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-07-01 13:06:25,628 INFO L168 Benchmark]: Toolchain (without parser) took 2133.31 ms. Allocated memory was 514.9 MB in the beginning and 586.2 MB in the end (delta: 71.3 MB). Free memory was 438.6 MB in the beginning and 529.9 MB in the end (delta: -91.3 MB). There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 13:06:25,628 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 514.9 MB. Free memory is still 458.5 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 13:06:25,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.90 ms. Allocated memory was 514.9 MB in the beginning and 559.9 MB in the end (delta: 45.1 MB). Free memory was 437.9 MB in the beginning and 526.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 28.1 MB. Max. memory is 50.3 GB. [2020-07-01 13:06:25,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.80 ms. Allocated memory is still 559.9 MB. Free memory was 526.1 MB in the beginning and 524.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. [2020-07-01 13:06:25,630 INFO L168 Benchmark]: Boogie Preprocessor took 25.40 ms. Allocated memory is still 559.9 MB. Free memory was 524.1 MB in the beginning and 522.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-07-01 13:06:25,631 INFO L168 Benchmark]: RCFGBuilder took 297.37 ms. Allocated memory is still 559.9 MB. Free memory was 522.7 MB in the beginning and 505.2 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 50.3 GB. [2020-07-01 13:06:25,631 INFO L168 Benchmark]: BlockEncodingV2 took 126.49 ms. Allocated memory is still 559.9 MB. Free memory was 505.2 MB in the beginning and 499.1 MB in the end (delta: 6.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 50.3 GB. [2020-07-01 13:06:25,632 INFO L168 Benchmark]: TraceAbstraction took 1314.92 ms. Allocated memory was 559.9 MB in the beginning and 586.2 MB in the end (delta: 26.2 MB). Free memory was 498.5 MB in the beginning and 529.9 MB in the end (delta: -31.5 MB). There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 13:06:25,632 INFO L168 Benchmark]: BuchiAutomizer took 4.51 ms. Allocated memory is still 586.2 MB. Free memory is still 529.9 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 13:06:25,636 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 18 locations, 23 edges - StatisticsResult: Encoded RCFG 12 locations, 20 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 514.9 MB. Free memory is still 458.5 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 317.90 ms. Allocated memory was 514.9 MB in the beginning and 559.9 MB in the end (delta: 45.1 MB). Free memory was 437.9 MB in the beginning and 526.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 28.1 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 40.80 ms. Allocated memory is still 559.9 MB. Free memory was 526.1 MB in the beginning and 524.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 25.40 ms. Allocated memory is still 559.9 MB. Free memory was 524.1 MB in the beginning and 522.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * RCFGBuilder took 297.37 ms. Allocated memory is still 559.9 MB. Free memory was 522.7 MB in the beginning and 505.2 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 126.49 ms. Allocated memory is still 559.9 MB. Free memory was 505.2 MB in the beginning and 499.1 MB in the end (delta: 6.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 50.3 GB. * TraceAbstraction took 1314.92 ms. Allocated memory was 559.9 MB in the beginning and 586.2 MB in the end (delta: 26.2 MB). Free memory was 498.5 MB in the beginning and 529.9 MB in the end (delta: -31.5 MB). There was no memory consumed. Max. memory is 50.3 GB. * BuchiAutomizer took 4.51 ms. Allocated memory is still 586.2 MB. Free memory is still 529.9 MB. There was no memory consumed. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L25] int length = __VERIFIER_nondet_int(); [L26] int n = __VERIFIER_nondet_int(); [L27] int c = __VERIFIER_nondet_int(); [L28] COND FALSE !(length < 1) [L31] COND FALSE !(n < 1) [L34] char* nondetArea = (char*) alloca(n * sizeof(char)); [L12] const unsigned char *cp; [L14] COND TRUE n != 0 [L15] cp = (unsigned char *)s + n [L17] --cp - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 119 SDslu, 96 SDs, 0 SdLazy, 162 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, 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, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 558 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 13:06:20.247 ----------------------------------------------- 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/sandbox2/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/sandbox2/tmp/BenchExec_run_jlTt72/tmp -i /export/starexec/sandbox2/benchmark/theBenchmark.c !ENTRY org.eclipse.core.resources 2 10035 2020-07-01 13:06:25.869 !MESSAGE The workspace will exit with unsaved changes in this session. Received shutdown request... Ultimate: GTK+ Version Check