/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:20:19,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:20:19,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:20:19,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:20:19,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:20:19,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:20:19,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:20:19,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:20:19,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:20:19,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:20:19,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:20:19,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:20:19,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:20:19,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:20:19,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:20:19,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:20:19,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:20:19,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:20:19,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:20:19,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:20:19,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:20:19,881 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:20:19,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:20:19,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:20:19,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:20:19,882 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:20:19,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:20:19,883 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:20:19,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:20:19,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:20:19,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:20:19,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:20:19,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:20:19,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:20:19,884 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:20:19,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:20:19,885 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:20:19,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:20:19,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:20:19,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:20:19,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:20:19,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:20:19,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:19,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:20:19,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:20:19,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:20:19,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:20:19,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:20:19,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:20:19,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:20:20,163 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:20:20,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:20:20,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:20:20,181 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:20:20,181 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:20:20,182 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-11-06 19:20:20,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f91ca7a5/bad7934371bf456499ceb36613bb1f11/FLAG1d8b31164 [2019-11-06 19:20:20,939 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:20:20,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-11-06 19:20:20,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f91ca7a5/bad7934371bf456499ceb36613bb1f11/FLAG1d8b31164 [2019-11-06 19:20:21,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f91ca7a5/bad7934371bf456499ceb36613bb1f11 [2019-11-06 19:20:21,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:20:21,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:20:21,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:21,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:20:21,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:20:21,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:21" (1/1) ... [2019-11-06 19:20:21,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7b20b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:21, skipping insertion in model container [2019-11-06 19:20:21,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:21" (1/1) ... [2019-11-06 19:20:21,111 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:20:21,222 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:20:22,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:22,528 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:20:22,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:23,025 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:20:23,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23 WrapperNode [2019-11-06 19:20:23,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:23,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:20:23,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:20:23,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:20:23,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... [2019-11-06 19:20:23,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... [2019-11-06 19:20:23,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... [2019-11-06 19:20:23,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... [2019-11-06 19:20:23,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... [2019-11-06 19:20:23,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... [2019-11-06 19:20:23,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... [2019-11-06 19:20:23,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:20:23,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:20:23,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:20:23,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:20:23,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:23,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:20:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:20:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:20:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:20:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:20:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:20:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:20:23,398 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:20:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:20:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:20:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:20:23,399 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:20:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:20:23,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:20:23,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:20:27,299 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:20:27,300 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:20:27,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:27 BoogieIcfgContainer [2019-11-06 19:20:27,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:20:27,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:20:27,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:20:27,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:20:27,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:20:21" (1/3) ... [2019-11-06 19:20:27,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f10a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:27, skipping insertion in model container [2019-11-06 19:20:27,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:23" (2/3) ... [2019-11-06 19:20:27,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f10a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:27, skipping insertion in model container [2019-11-06 19:20:27,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:27" (3/3) ... [2019-11-06 19:20:27,310 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label21.c [2019-11-06 19:20:27,319 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:20:27,327 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:20:27,337 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:20:27,371 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:20:27,371 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:20:27,372 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:20:27,372 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:20:27,372 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:20:27,372 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:20:27,372 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:20:27,372 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:20:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:20:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 19:20:27,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:27,417 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:27,419 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -242469919, now seen corresponding path program 1 times [2019-11-06 19:20:27,434 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:27,434 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173910292] [2019-11-06 19:20:27,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:27,875 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173910292] [2019-11-06 19:20:27,876 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:27,876 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:20:27,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651530308] [2019-11-06 19:20:27,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:27,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:20:27,902 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:20:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:37,693 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-11-06 19:20:37,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:20:37,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2019-11-06 19:20:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:37,739 INFO L225 Difference]: With dead ends: 2984 [2019-11-06 19:20:37,740 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:20:37,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:20:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:20:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-11-06 19:20:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-11-06 19:20:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-11-06 19:20:37,920 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 64 [2019-11-06 19:20:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:37,921 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-11-06 19:20:37,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-11-06 19:20:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 19:20:37,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:37,929 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:37,929 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:37,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1527115477, now seen corresponding path program 1 times [2019-11-06 19:20:37,930 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:37,930 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789542195] [2019-11-06 19:20:37,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:38,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789542195] [2019-11-06 19:20:38,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:38,267 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:20:38,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271879497] [2019-11-06 19:20:38,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:20:38,273 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:38,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:20:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:20:38,273 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-11-06 19:20:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:49,174 INFO L93 Difference]: Finished difference Result 8648 states and 15579 transitions. [2019-11-06 19:20:49,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:20:49,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-11-06 19:20:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:49,215 INFO L225 Difference]: With dead ends: 8648 [2019-11-06 19:20:49,216 INFO L226 Difference]: Without dead ends: 6522 [2019-11-06 19:20:49,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:20:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2019-11-06 19:20:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 6483. [2019-11-06 19:20:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6483 states. [2019-11-06 19:20:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 10418 transitions. [2019-11-06 19:20:49,498 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 10418 transitions. Word has length 137 [2019-11-06 19:20:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:49,501 INFO L462 AbstractCegarLoop]: Abstraction has 6483 states and 10418 transitions. [2019-11-06 19:20:49,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:20:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 10418 transitions. [2019-11-06 19:20:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-06 19:20:49,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:49,517 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:49,518 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:49,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1106833084, now seen corresponding path program 1 times [2019-11-06 19:20:49,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:49,520 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37077856] [2019-11-06 19:20:49,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:49,936 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37077856] [2019-11-06 19:20:49,936 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:49,936 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:20:49,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412941627] [2019-11-06 19:20:49,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:20:49,937 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:49,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:20:49,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:20:49,938 INFO L87 Difference]: Start difference. First operand 6483 states and 10418 transitions. Second operand 9 states. [2019-11-06 19:20:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:56,750 INFO L93 Difference]: Finished difference Result 15225 states and 24469 transitions. [2019-11-06 19:20:56,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:20:56,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 226 [2019-11-06 19:20:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:56,803 INFO L225 Difference]: With dead ends: 15225 [2019-11-06 19:20:56,804 INFO L226 Difference]: Without dead ends: 8748 [2019-11-06 19:20:56,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:20:56,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8748 states. [2019-11-06 19:20:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8748 to 8702. [2019-11-06 19:20:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8702 states. [2019-11-06 19:20:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8702 states to 8702 states and 12840 transitions. [2019-11-06 19:20:57,060 INFO L78 Accepts]: Start accepts. Automaton has 8702 states and 12840 transitions. Word has length 226 [2019-11-06 19:20:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:57,063 INFO L462 AbstractCegarLoop]: Abstraction has 8702 states and 12840 transitions. [2019-11-06 19:20:57,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:20:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 8702 states and 12840 transitions. [2019-11-06 19:20:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-11-06 19:20:57,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:57,073 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:57,074 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:57,074 INFO L82 PathProgramCache]: Analyzing trace with hash 63559159, now seen corresponding path program 1 times [2019-11-06 19:20:57,074 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:57,075 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534492250] [2019-11-06 19:20:57,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat