/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/Problem03_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:00:21,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:00:21,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:00:21,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:00:21,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:00:21,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:00:21,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:00:21,127 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 19:00:21,155 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:00:21,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:00:21,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:00:21,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:00:21,157 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:00:21,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:00:21,157 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:00:21,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:00:21,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:00:21,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:00:21,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:00:21,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:00:21,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:00:21,159 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:00:21,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:00:21,159 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:00:21,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:00:21,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:00:21,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:00:21,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:00:21,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:00:21,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:00:21,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:00:21,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:00:21,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:00:21,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:00:21,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:00:21,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:00:21,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:00:21,430 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:00:21,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:00:21,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:00:21,449 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:00:21,449 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:00:21,450 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2019-11-06 19:00:21,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6f816a5/2a7c2e8c43bb4248b47afa25275c2cb5/FLAGca450e275 [2019-11-06 19:00:22,206 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:00:22,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2019-11-06 19:00:22,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6f816a5/2a7c2e8c43bb4248b47afa25275c2cb5/FLAGca450e275 [2019-11-06 19:00:22,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6f816a5/2a7c2e8c43bb4248b47afa25275c2cb5 [2019-11-06 19:00:22,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:00:22,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:00:22,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:22,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:00:22,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:00:22,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:22" (1/1) ... [2019-11-06 19:00:22,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373e4cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:22, skipping insertion in model container [2019-11-06 19:00:22,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:22" (1/1) ... [2019-11-06 19:00:22,435 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:00:22,524 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:00:23,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:23,295 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:00:23,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:23,726 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:00:23,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23 WrapperNode [2019-11-06 19:00:23,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:23,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:00:23,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:00:23,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:00:23,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:00:23,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:00:23,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:00:23,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:00:23,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (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 19:00:23,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:00:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:00:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:00:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:00:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:00:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:00:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:00:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:00:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:00:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:00:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:00:25,924 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:00:25,924 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:00:25,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:25 BoogieIcfgContainer [2019-11-06 19:00:25,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:00:25,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:00:25,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:00:25,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:00:25,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:00:22" (1/3) ... [2019-11-06 19:00:25,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da31aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:25, skipping insertion in model container [2019-11-06 19:00:25,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23" (2/3) ... [2019-11-06 19:00:25,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da31aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:25, skipping insertion in model container [2019-11-06 19:00:25,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:25" (3/3) ... [2019-11-06 19:00:25,947 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label10.c [2019-11-06 19:00:25,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:00:25,971 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:00:25,984 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:00:26,027 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:00:26,027 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:00:26,028 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:00:26,029 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:00:26,029 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:00:26,029 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:00:26,029 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:00:26,030 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:00:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:00:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 19:00:26,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:26,101 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:00:26,106 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash 430860112, now seen corresponding path program 1 times [2019-11-06 19:00:26,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:26,123 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749606327] [2019-11-06 19:00:26,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:27,000 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:27,152 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 19:00:27,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749606327] [2019-11-06 19:00:27,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:27,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:00:27,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52111833] [2019-11-06 19:00:27,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:27,162 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:27,180 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:00:27,370 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:30,603 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-11-06 19:00:30,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:00:30,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-11-06 19:00:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:30,623 INFO L225 Difference]: With dead ends: 845 [2019-11-06 19:00:30,624 INFO L226 Difference]: Without dead ends: 470 [2019-11-06 19:00:30,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:00:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-11-06 19:00:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-11-06 19:00:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-11-06 19:00:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-11-06 19:00:30,716 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 187 [2019-11-06 19:00:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:30,718 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-11-06 19:00:30,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-11-06 19:00:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-06 19:00:30,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:30,723 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:00:30,723 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1383475667, now seen corresponding path program 1 times [2019-11-06 19:00:30,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:30,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88155942] [2019-11-06 19:00:30,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:31,042 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:31,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88155942] [2019-11-06 19:00:31,234 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:31,235 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:00:31,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695411740] [2019-11-06 19:00:31,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:00:31,237 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:00:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:31,238 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-11-06 19:00:31,399 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:34,212 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:00:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:34,794 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-11-06 19:00:34,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:00:34,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 196 [2019-11-06 19:00:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:34,810 INFO L225 Difference]: With dead ends: 1407 [2019-11-06 19:00:34,813 INFO L226 Difference]: Without dead ends: 949 [2019-11-06 19:00:34,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:00:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-11-06 19:00:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-11-06 19:00:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-11-06 19:00:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-11-06 19:00:34,907 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 196 [2019-11-06 19:00:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:34,908 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-11-06 19:00:34,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:00:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-11-06 19:00:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-06 19:00:34,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:34,915 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:00:34,915 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:34,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash -689589660, now seen corresponding path program 1 times [2019-11-06 19:00:34,917 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:34,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787040554] [2019-11-06 19:00:34,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:35,350 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:35,549 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:00:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:35,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787040554] [2019-11-06 19:00:35,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444247641] [2019-11-06 19:00:35,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-06 19:00:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:35,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:00:35,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:35,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:35,943 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-11-06 19:00:35,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506938638] [2019-11-06 19:00:35,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:35,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:35,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:35,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:35,945 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-11-06 19:00:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:37,539 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-11-06 19:00:37,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:37,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2019-11-06 19:00:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:37,559 INFO L225 Difference]: With dead ends: 2749 [2019-11-06 19:00:37,560 INFO L226 Difference]: Without dead ends: 1850 [2019-11-06 19:00:37,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-11-06 19:00:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-11-06 19:00:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-11-06 19:00:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-11-06 19:00:37,644 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 199 [2019-11-06 19:00:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:37,644 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-11-06 19:00:37,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-11-06 19:00:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-06 19:00:37,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:37,654 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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 19:00:37,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:37,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:37,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1935767062, now seen corresponding path program 1 times [2019-11-06 19:00:37,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:37,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853096510] [2019-11-06 19:00:37,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:38,114 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:00:38,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853096510] [2019-11-06 19:00:38,434 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565122122] [2019-11-06 19:00:38,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:38,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:00:38,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:00:38,843 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:38,843 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-11-06 19:00:38,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905003495] [2019-11-06 19:00:38,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:38,844 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:38,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:38,845 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-11-06 19:00:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:40,263 INFO L93 Difference]: Finished difference Result 5485 states and 9340 transitions. [2019-11-06 19:00:40,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:00:40,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2019-11-06 19:00:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:40,333 INFO L225 Difference]: With dead ends: 5485 [2019-11-06 19:00:40,333 INFO L226 Difference]: Without dead ends: 3675 [2019-11-06 19:00:40,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:00:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-11-06 19:00:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3599. [2019-11-06 19:00:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-11-06 19:00:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5610 transitions. [2019-11-06 19:00:40,473 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5610 transitions. Word has length 206 [2019-11-06 19:00:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:40,473 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5610 transitions. [2019-11-06 19:00:40,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5610 transitions. [2019-11-06 19:00:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-06 19:00:40,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:40,485 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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 19:00:40,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:40,690 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:40,691 INFO L82 PathProgramCache]: Analyzing trace with hash 773794776, now seen corresponding path program 1 times [2019-11-06 19:00:40,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:40,692 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14263514] [2019-11-06 19:00:40,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:40,925 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:41,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14263514] [2019-11-06 19:00:41,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790722658] [2019-11-06 19:00:41,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:00:41,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 19:00:41,484 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:00:41,484 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:00:41,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690916449] [2019-11-06 19:00:41,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:00:41,486 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:00:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:41,486 INFO L87 Difference]: Start difference. First operand 3599 states and 5610 transitions. Second operand 11 states. [2019-11-06 19:00:41,712 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:42,017 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:42,412 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:42,761 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-11-06 19:00:45,158 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:52,861 INFO L93 Difference]: Finished difference Result 15053 states and 30169 transitions. [2019-11-06 19:00:52,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 19:00:52,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 217 [2019-11-06 19:00:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:52,953 INFO L225 Difference]: With dead ends: 15053 [2019-11-06 19:00:52,954 INFO L226 Difference]: Without dead ends: 11460 [2019-11-06 19:00:52,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 19:00:52,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-11-06 19:00:53,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-11-06 19:00:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-11-06 19:00:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18327 transitions. [2019-11-06 19:00:53,643 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18327 transitions. Word has length 217 [2019-11-06 19:00:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:53,644 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18327 transitions. [2019-11-06 19:00:53,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:00:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18327 transitions. [2019-11-06 19:00:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 19:00:53,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:53,713 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 19:00:53,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:53,917 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1924879000, now seen corresponding path program 1 times [2019-11-06 19:00:53,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:53,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303265994] [2019-11-06 19:00:53,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,138 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:54,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303265994] [2019-11-06 19:00:54,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333010727] [2019-11-06 19:00:54,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:00:54,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:54,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:00:54,685 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:00:54,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787280019] [2019-11-06 19:00:54,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:00:54,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:00:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:54,687 INFO L87 Difference]: Start difference. First operand 11174 states and 18327 transitions. Second operand 8 states. [2019-11-06 19:00:54,861 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:56,849 INFO L93 Difference]: Finished difference Result 22082 states and 36551 transitions. [2019-11-06 19:00:56,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:00:56,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 225 [2019-11-06 19:00:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:56,915 INFO L225 Difference]: With dead ends: 22082 [2019-11-06 19:00:56,915 INFO L226 Difference]: Without dead ends: 10914 [2019-11-06 19:00:56,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:00:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2019-11-06 19:00:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 10910. [2019-11-06 19:00:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10910 states. [2019-11-06 19:00:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10910 states to 10910 states and 17537 transitions. [2019-11-06 19:00:57,728 INFO L78 Accepts]: Start accepts. Automaton has 10910 states and 17537 transitions. Word has length 225 [2019-11-06 19:00:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:57,730 INFO L462 AbstractCegarLoop]: Abstraction has 10910 states and 17537 transitions. [2019-11-06 19:00:57,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:00:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10910 states and 17537 transitions. [2019-11-06 19:00:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-11-06 19:00:57,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:57,807 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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]