/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 12:28:51,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-01 12:28:51,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-01 12:28:51,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-01 12:28:51,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-01 12:28:51,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-01 12:28:51,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-01 12:28:51,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-01 12:28:51,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-01 12:28:51,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-01 12:28:51,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-01 12:28:51,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-01 12:28:51,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-01 12:28:51,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-01 12:28:51,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-01 12:28:51,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-01 12:28:51,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-01 12:28:51,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-01 12:28:51,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-01 12:28:51,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-01 12:28:51,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-01 12:28:51,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-01 12:28:51,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-01 12:28:51,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-01 12:28:51,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-01 12:28:51,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-01 12:28:51,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-01 12:28:51,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-01 12:28:51,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-01 12:28:51,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-01 12:28:51,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-01 12:28:51,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-01 12:28:51,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-01 12:28:51,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-01 12:28:51,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-01 12:28:51,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-01 12:28:51,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-01 12:28:51,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-01 12:28:51,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-01 12:28:51,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-01 12:28:51,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-01 12:28:51,793 INFO L101 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-07-01 12:28:51,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-01 12:28:51,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-01 12:28:51,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-01 12:28:51,809 INFO L138 SettingsManager]: * Rewrite not-equals=true [2020-07-01 12:28:51,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-01 12:28:51,809 INFO L138 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:28:51,809 INFO L138 SettingsManager]: * Use SBE=true [2020-07-01 12:28:51,809 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-07-01 12:28:51,810 INFO L138 SettingsManager]: * Use old map elimination=false [2020-07-01 12:28:51,810 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-07-01 12:28:51,810 INFO L138 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-07-01 12:28:51,810 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-07-01 12:28:51,810 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-07-01 12:28:51,810 INFO L138 SettingsManager]: * Construct termination proof for TermComp=true [2020-07-01 12:28:51,811 INFO L138 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-07-01 12:28:51,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-01 12:28:51,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-07-01 12:28:51,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-01 12:28:51,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-01 12:28:51,812 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-07-01 12:28:51,812 INFO L138 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-07-01 12:28:51,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-01 12:28:51,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-01 12:28:51,812 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-07-01 12:28:51,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-07-01 12:28:51,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-01 12:28:51,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-01 12:28:51,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-01 12:28:51,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-01 12:28:51,974 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-01 12:28:51,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-01 12:28:51,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-01 12:28:51,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-01 12:28:51,993 INFO L275 PluginConnector]: CDTParser initialized [2020-07-01 12:28:51,994 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:28:52,049 INFO L220 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_MuYdM0/tmp/fed348a63c704b1cba0c4665b1b2dbf0/FLAGf3e69fe01 [2020-07-01 12:28:52,386 INFO L306 CDTParser]: Found 1 translation units. [2020-07-01 12:28:52,387 INFO L160 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-07-01 12:28:52,387 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-07-01 12:28:52,394 INFO L349 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/BenchExec_run_MuYdM0/tmp/fed348a63c704b1cba0c4665b1b2dbf0/FLAGf3e69fe01 [2020-07-01 12:28:52,792 INFO L357 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/BenchExec_run_MuYdM0/tmp/fed348a63c704b1cba0c4665b1b2dbf0 [2020-07-01 12:28:52,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-01 12:28:52,804 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-07-01 12:28:52,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-01 12:28:52,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-01 12:28:52,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-01 12:28:52,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:28:52" (1/1) ... [2020-07-01 12:28:52,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e947adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:52, skipping insertion in model container [2020-07-01 12:28:52,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.07 12:28:52" (1/1) ... [2020-07-01 12:28:52,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-01 12:28:52,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-01 12:28:53,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:28:53,091 INFO L203 MainTranslator]: Completed pre-run [2020-07-01 12:28:53,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-01 12:28:53,127 INFO L208 MainTranslator]: Completed translation [2020-07-01 12:28:53,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53 WrapperNode [2020-07-01 12:28:53,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-01 12:28:53,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-01 12:28:53,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-01 12:28:53,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-01 12:28:53,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-01 12:28:53,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-01 12:28:53,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-01 12:28:53,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-01 12:28:53,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-01 12:28:53,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-01 12:28:53,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-01 12:28:53,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-01 12:28:53,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (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 12:28:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-01 12:28:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-01 12:28:53,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-01 12:28:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-01 12:28:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-01 12:28:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-01 12:28:53,595 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-01 12:28:53,596 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-01 12:28:53,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:28:53 BoogieIcfgContainer [2020-07-01 12:28:53,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-01 12:28:53,600 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-07-01 12:28:53,601 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-07-01 12:28:53,603 INFO L275 PluginConnector]: BlockEncodingV2 initialized [2020-07-01 12:28:53,603 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:28:53" (1/1) ... [2020-07-01 12:28:53,619 INFO L313 BlockEncoder]: Initial Icfg 52 locations, 59 edges [2020-07-01 12:28:53,621 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-07-01 12:28:53,621 INFO L263 BlockEncoder]: Using Maximize final states [2020-07-01 12:28:53,622 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-07-01 12:28:53,622 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-07-01 12:28:53,624 INFO L296 BlockEncoder]: Using Remove sink states [2020-07-01 12:28:53,625 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-07-01 12:28:53,625 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-07-01 12:28:53,659 INFO L185 BlockEncoder]: Using Use SBE [2020-07-01 12:28:53,716 INFO L200 BlockEncoder]: SBE split 27 edges [2020-07-01 12:28:53,722 INFO L70 emoveInfeasibleEdges]: Removed 2 edges and 0 locations because of local infeasibility [2020-07-01 12:28:53,724 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:28:53,768 INFO L100 BaseMinimizeStates]: Removed 18 edges and 9 locations by large block encoding [2020-07-01 12:28:53,771 INFO L70 RemoveSinkStates]: Removed 1 edges and 1 locations by removing sink states [2020-07-01 12:28:53,772 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-07-01 12:28:53,773 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-07-01 12:28:53,773 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-07-01 12:28:53,774 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-07-01 12:28:53,774 INFO L313 BlockEncoder]: Encoded RCFG 42 locations, 148 edges [2020-07-01 12:28:53,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:28:53 BasicIcfg [2020-07-01 12:28:53,775 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-07-01 12:28:53,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-01 12:28:53,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-01 12:28:53,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-01 12:28:53,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.07 12:28:52" (1/4) ... [2020-07-01 12:28:53,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4f6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:28:53, skipping insertion in model container [2020-07-01 12:28:53,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.07 12:28:53" (2/4) ... [2020-07-01 12:28:53,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4f6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.07 12:28:53, skipping insertion in model container [2020-07-01 12:28:53,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.07 12:28:53" (3/4) ... [2020-07-01 12:28:53,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4f6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:28:53, skipping insertion in model container [2020-07-01 12:28:53,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 01.07 12:28:53" (4/4) ... [2020-07-01 12:28:53,784 INFO L109 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-07-01 12:28:53,794 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-07-01 12:28:53,802 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-07-01 12:28:53,815 INFO L251 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-07-01 12:28:53,839 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-01 12:28:53,839 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-01 12:28:53,839 INFO L377 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-07-01 12:28:53,839 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-01 12:28:53,840 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-01 12:28:53,840 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-01 12:28:53,840 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-01 12:28:53,840 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-01 12:28:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-01 12:28:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:28:53,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:28:53,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:28:53,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_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.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:28:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:28:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1269028069, now seen corresponding path program 1 times [2020-07-01 12:28:53,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:28:53,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943795332] [2020-07-01 12:28:53,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:28:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:28:54,015 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 12:28:54,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943795332] [2020-07-01 12:28:54,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:28:54,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:28:54,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764243694] [2020-07-01 12:28:54,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-01 12:28:54,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:28:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-01 12:28:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-01 12:28:54,040 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2020-07-01 12:28:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:28:54,316 INFO L93 Difference]: Finished difference Result 81 states and 274 transitions. [2020-07-01 12:28:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-01 12:28:54,318 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-07-01 12:28:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:28:54,331 INFO L225 Difference]: With dead ends: 81 [2020-07-01 12:28:54,331 INFO L226 Difference]: Without dead ends: 42 [2020-07-01 12:28:54,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-01 12:28:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-01 12:28:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-01 12:28:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-01 12:28:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 84 transitions. [2020-07-01 12:28:54,380 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 84 transitions. Word has length 6 [2020-07-01 12:28:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:28:54,381 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 84 transitions. [2020-07-01 12:28:54,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-01 12:28:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 84 transitions. [2020-07-01 12:28:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:28:54,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:28:54,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:28:54,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-01 12:28:54,384 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_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.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:28:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:28:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1269206815, now seen corresponding path program 1 times [2020-07-01 12:28:54,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:28:54,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559432043] [2020-07-01 12:28:54,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:28:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:28:54,431 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 12:28:54,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559432043] [2020-07-01 12:28:54,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:28:54,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:28:54,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945092102] [2020-07-01 12:28:54,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:28:54,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:28:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:28:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:28:54,434 INFO L87 Difference]: Start difference. First operand 42 states and 84 transitions. Second operand 3 states. [2020-07-01 12:28:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:28:54,563 INFO L93 Difference]: Finished difference Result 42 states and 84 transitions. [2020-07-01 12:28:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:28:54,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-07-01 12:28:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:28:54,565 INFO L225 Difference]: With dead ends: 42 [2020-07-01 12:28:54,566 INFO L226 Difference]: Without dead ends: 38 [2020-07-01 12:28:54,567 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 12:28:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-01 12:28:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-01 12:28:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-01 12:28:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2020-07-01 12:28:54,572 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 6 [2020-07-01 12:28:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:28:54,573 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2020-07-01 12:28:54,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:28:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2020-07-01 12:28:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:28:54,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:28:54,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:28:54,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-01 12:28:54,574 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_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.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:28:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:28:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1269206817, now seen corresponding path program 1 times [2020-07-01 12:28:54,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:28:54,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678027595] [2020-07-01 12:28:54,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:28:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:28:54,604 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 12:28:54,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678027595] [2020-07-01 12:28:54,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:28:54,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-01 12:28:54,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229057305] [2020-07-01 12:28:54,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-01 12:28:54,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:28:54,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-01 12:28:54,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-01 12:28:54,607 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand 3 states. [2020-07-01 12:28:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:28:54,832 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2020-07-01 12:28:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-01 12:28:54,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-07-01 12:28:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:28:54,835 INFO L225 Difference]: With dead ends: 76 [2020-07-01 12:28:54,835 INFO L226 Difference]: Without dead ends: 72 [2020-07-01 12:28:54,835 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 12:28:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-01 12:28:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2020-07-01 12:28:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-01 12:28:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 98 transitions. [2020-07-01 12:28:54,844 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 98 transitions. Word has length 6 [2020-07-01 12:28:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:28:54,844 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 98 transitions. [2020-07-01 12:28:54,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-01 12:28:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 98 transitions. [2020-07-01 12:28:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-01 12:28:54,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:28:54,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-01 12:28:54,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-01 12:28:54,846 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_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.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:28:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:28:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1269206818, now seen corresponding path program 1 times [2020-07-01 12:28:54,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:28:54,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472987113] [2020-07-01 12:28:54,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:28:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:28:54,925 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 12:28:54,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472987113] [2020-07-01 12:28:54,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-01 12:28:54,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-01 12:28:54,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109856193] [2020-07-01 12:28:54,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 12:28:54,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:28:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 12:28:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 12:28:54,927 INFO L87 Difference]: Start difference. First operand 44 states and 98 transitions. Second operand 5 states. [2020-07-01 12:28:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:28:55,178 INFO L93 Difference]: Finished difference Result 85 states and 179 transitions. [2020-07-01 12:28:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-01 12:28:55,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-07-01 12:28:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:28:55,179 INFO L225 Difference]: With dead ends: 85 [2020-07-01 12:28:55,179 INFO L226 Difference]: Without dead ends: 44 [2020-07-01 12:28:55,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-01 12:28:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-01 12:28:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-01 12:28:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-01 12:28:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2020-07-01 12:28:55,186 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 6 [2020-07-01 12:28:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:28:55,186 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2020-07-01 12:28:55,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 12:28:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2020-07-01 12:28:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-01 12:28:55,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:28:55,187 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:28:55,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-01 12:28:55,187 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_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.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:28:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:28:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -479480241, now seen corresponding path program 1 times [2020-07-01 12:28:55,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:28:55,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640795895] [2020-07-01 12:28:55,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:28:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:28:55,234 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 12:28:55,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640795895] [2020-07-01 12:28:55,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868379038] [2020-07-01 12:28:55,235 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 12:28:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-01 12:28:55,278 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-01 12:28:55,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-01 12:28:55,328 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 12:28:55,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-01 12:28:55,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2020-07-01 12:28:55,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206815234] [2020-07-01 12:28:55,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-01 12:28:55,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-01 12:28:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-01 12:28:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-01 12:28:55,330 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand 5 states. [2020-07-01 12:28:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-01 12:28:55,493 INFO L93 Difference]: Finished difference Result 111 states and 207 transitions. [2020-07-01 12:28:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-01 12:28:55,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-01 12:28:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-01 12:28:55,495 INFO L225 Difference]: With dead ends: 111 [2020-07-01 12:28:55,495 INFO L226 Difference]: Without dead ends: 77 [2020-07-01 12:28:55,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-01 12:28:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-01 12:28:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 52. [2020-07-01 12:28:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-01 12:28:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 93 transitions. [2020-07-01 12:28:55,503 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 93 transitions. Word has length 10 [2020-07-01 12:28:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-01 12:28:55,504 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 93 transitions. [2020-07-01 12:28:55,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-01 12:28:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 93 transitions. [2020-07-01 12:28:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-01 12:28:55,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-01 12:28:55,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-01 12:28:55,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-01 12:28:55,706 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_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.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-07-01 12:28:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-01 12:28:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash -479479199, now seen corresponding path program 1 times [2020-07-01 12:28:55,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-01 12:28:55,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303869612] [2020-07-01 12:28:55,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-01 12:28:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:28:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-01 12:28:55,753 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-01 12:28:55,753 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-01 12:28:55,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-01 12:28:55,774 INFO L308 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-07-01 12:28:55,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.07 12:28:55 BasicIcfg [2020-07-01 12:28:55,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-01 12:28:55,778 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-07-01 12:28:55,778 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-07-01 12:28:55,781 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-07-01 12:28:55,781 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:28:55,781 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:28:55,782 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:28:55,782 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:28:55,782 INFO L96 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-07-01 12:28:55,782 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-07-01 12:28:55,795 INFO L168 Benchmark]: Toolchain (without parser) took 2989.78 ms. Allocated memory was 649.6 MB in the beginning and 752.4 MB in the end (delta: 102.8 MB). Free memory was 560.5 MB in the beginning and 709.9 MB in the end (delta: -149.4 MB). Peak memory consumption was 218.9 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,796 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 649.6 MB. Free memory is still 583.2 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-07-01 12:28:55,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.00 ms. Allocated memory was 649.6 MB in the beginning and 692.1 MB in the end (delta: 42.5 MB). Free memory was 560.5 MB in the beginning and 654.1 MB in the end (delta: -93.6 MB). Peak memory consumption was 28.4 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,797 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.85 ms. Allocated memory is still 692.1 MB. Free memory was 654.1 MB in the beginning and 651.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,798 INFO L168 Benchmark]: Boogie Preprocessor took 28.29 ms. Allocated memory is still 692.1 MB. Free memory was 651.4 MB in the beginning and 650.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,798 INFO L168 Benchmark]: RCFGBuilder took 400.51 ms. Allocated memory is still 692.1 MB. Free memory was 650.0 MB in the beginning and 622.1 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,800 INFO L168 Benchmark]: BlockEncodingV2 took 174.66 ms. Allocated memory is still 692.1 MB. Free memory was 622.1 MB in the beginning and 607.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,800 INFO L168 Benchmark]: TraceAbstraction took 2000.82 ms. Allocated memory is still 692.1 MB. Free memory was 605.9 MB in the beginning and 396.9 MB in the end (delta: 209.1 MB). Peak memory consumption was 209.1 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,801 INFO L168 Benchmark]: BuchiAutomizer took 14.52 ms. Allocated memory was 692.1 MB in the beginning and 752.4 MB in the end (delta: 60.3 MB). Free memory was 396.9 MB in the beginning and 709.9 MB in the end (delta: -313.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 50.3 GB. [2020-07-01 12:28:55,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 52 locations, 59 edges - StatisticsResult: Encoded RCFG 42 locations, 148 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 583.2 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 323.00 ms. Allocated memory was 649.6 MB in the beginning and 692.1 MB in the end (delta: 42.5 MB). Free memory was 560.5 MB in the beginning and 654.1 MB in the end (delta: -93.6 MB). Peak memory consumption was 28.4 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 41.85 ms. Allocated memory is still 692.1 MB. Free memory was 654.1 MB in the beginning and 651.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 28.29 ms. Allocated memory is still 692.1 MB. Free memory was 651.4 MB in the beginning and 650.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 50.3 GB. * RCFGBuilder took 400.51 ms. Allocated memory is still 692.1 MB. Free memory was 650.0 MB in the beginning and 622.1 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 174.66 ms. Allocated memory is still 692.1 MB. Free memory was 622.1 MB in the beginning and 607.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 50.3 GB. * TraceAbstraction took 2000.82 ms. Allocated memory is still 692.1 MB. Free memory was 605.9 MB in the beginning and 396.9 MB in the end (delta: 209.1 MB). Peak memory consumption was 209.1 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 14.52 ms. Allocated memory was 692.1 MB in the beginning and 752.4 MB in the end (delta: 60.3 MB). Free memory was 396.9 MB in the beginning and 709.9 MB in the end (delta: -313.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L5] int i, j, tmp; [L6] int length = __VERIFIER_nondet_int(); [L7] COND TRUE length < 1 [L7] length = 1 [L9] COND FALSE !(length % 2 == 0) [L10] int *arr = alloca(length*sizeof(int)); [L12] i=0 [L12] COND TRUE i