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/Problem14_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:01,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:01,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:01,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 22:01:01,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:01,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:01,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:01,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:01,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:01,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:01,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:01,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:01,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:01,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:01,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:01,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:01,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:01,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:01,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:01,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:01,790 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 [2019-10-14 22:01:01,806 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:01,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:01,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:01,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:01,808 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:01,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:01,808 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:01,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:01,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:01,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:01,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:01,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:01,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:01,810 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:01,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:01,810 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:01,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:01,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:01,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:01,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:01,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:01,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:01,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:01,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:01,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:01,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:01,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:01,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:01,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:02,107 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:02,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:02,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:02,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:02,125 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:02,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label03.c [2019-10-14 22:01:02,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3908707c0/a9a13790c39545e6ba710d414762c2c3/FLAG766780250 [2019-10-14 22:01:02,786 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:02,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label03.c [2019-10-14 22:01:02,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3908707c0/a9a13790c39545e6ba710d414762c2c3/FLAG766780250 [2019-10-14 22:01:03,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3908707c0/a9a13790c39545e6ba710d414762c2c3 [2019-10-14 22:01:03,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:03,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:03,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:03,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:03,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:03,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:03,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03, skipping insertion in model container [2019-10-14 22:01:03,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:03,050 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:03,109 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:03,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:03,677 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:03,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:03,868 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:03,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03 WrapperNode [2019-10-14 22:01:03,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:03,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:03,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:03,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:03,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:03,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:03,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:03,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:03,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:04,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:04,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (1/1) ... [2019-10-14 22:01:04,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:04,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:04,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:04,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:04,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (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 [2019-10-14 22:01:04,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:04,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:04,109 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:04,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:04,109 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:05,781 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:05,781 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:05,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:05 BoogieIcfgContainer [2019-10-14 22:01:05,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:05,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:05,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:05,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:05,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:03" (1/3) ... [2019-10-14 22:01:05,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@745d4892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:05, skipping insertion in model container [2019-10-14 22:01:05,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:03" (2/3) ... [2019-10-14 22:01:05,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@745d4892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:05, skipping insertion in model container [2019-10-14 22:01:05,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:05" (3/3) ... [2019-10-14 22:01:05,802 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label03.c [2019-10-14 22:01:05,813 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:05,824 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:05,837 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:05,866 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:05,866 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:05,866 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:05,867 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:05,867 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:05,867 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:05,867 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:05,868 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 22:01:05,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:05,904 INFO L380 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] [2019-10-14 22:01:05,905 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash -134949414, now seen corresponding path program 1 times [2019-10-14 22:01:05,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:05,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649755081] [2019-10-14 22:01:05,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:05,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:05,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:06,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649755081] [2019-10-14 22:01:06,303 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:06,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:06,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561653520] [2019-10-14 22:01:06,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:06,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:06,330 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:08,690 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:01:08,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:01:08,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-14 22:01:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:08,713 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:01:08,714 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:01:08,724 INFO L600 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 [2019-10-14 22:01:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:01:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:01:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:01:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:01:08,826 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 57 [2019-10-14 22:01:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:08,850 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:01:08,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:01:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 22:01:08,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:08,862 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:08,862 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:08,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1948270641, now seen corresponding path program 1 times [2019-10-14 22:01:08,863 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:08,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345559338] [2019-10-14 22:01:08,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:08,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:08,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:09,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345559338] [2019-10-14 22:01:09,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:09,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:01:09,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999266469] [2019-10-14 22:01:09,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:09,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:09,335 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:01:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:11,960 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-10-14 22:01:11,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:11,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 126 [2019-10-14 22:01:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:11,975 INFO L225 Difference]: With dead ends: 2246 [2019-10-14 22:01:11,975 INFO L226 Difference]: Without dead ends: 1694 [2019-10-14 22:01:11,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:01:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-14 22:01:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 938. [2019-10-14 22:01:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2019-10-14 22:01:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1456 transitions. [2019-10-14 22:01:12,064 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1456 transitions. Word has length 126 [2019-10-14 22:01:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:12,066 INFO L462 AbstractCegarLoop]: Abstraction has 938 states and 1456 transitions. [2019-10-14 22:01:12,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1456 transitions. [2019-10-14 22:01:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 22:01:12,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:12,076 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:12,077 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1389750477, now seen corresponding path program 1 times [2019-10-14 22:01:12,078 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:12,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472190873] [2019-10-14 22:01:12,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:12,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:12,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:12,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472190873] [2019-10-14 22:01:12,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:12,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:01:12,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061503014] [2019-10-14 22:01:12,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:01:12,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:12,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:01:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:12,345 INFO L87 Difference]: Start difference. First operand 938 states and 1456 transitions. Second operand 8 states. [2019-10-14 22:01:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:15,610 INFO L93 Difference]: Finished difference Result 3280 states and 5572 transitions. [2019-10-14 22:01:15,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:15,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 156 [2019-10-14 22:01:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:15,633 INFO L225 Difference]: With dead ends: 3280 [2019-10-14 22:01:15,633 INFO L226 Difference]: Without dead ends: 2348 [2019-10-14 22:01:15,637 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-14 22:01:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2108. [2019-10-14 22:01:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2108 states. [2019-10-14 22:01:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3138 transitions. [2019-10-14 22:01:15,744 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3138 transitions. Word has length 156 [2019-10-14 22:01:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:15,747 INFO L462 AbstractCegarLoop]: Abstraction has 2108 states and 3138 transitions. [2019-10-14 22:01:15,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:01:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3138 transitions. [2019-10-14 22:01:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 22:01:15,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:15,754 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:15,754 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:15,755 INFO L82 PathProgramCache]: Analyzing trace with hash -606122255, now seen corresponding path program 1 times [2019-10-14 22:01:15,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:15,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729408699] [2019-10-14 22:01:15,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:15,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:15,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:16,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729408699] [2019-10-14 22:01:16,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659569929] [2019-10-14 22:01:16,150 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 [2019-10-14 22:01:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:16,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:16,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:16,374 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:16,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:16,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351797983] [2019-10-14 22:01:16,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:16,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:16,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:16,377 INFO L87 Difference]: Start difference. First operand 2108 states and 3138 transitions. Second operand 3 states. [2019-10-14 22:01:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:17,298 INFO L93 Difference]: Finished difference Result 2670 states and 4095 transitions. [2019-10-14 22:01:17,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:17,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2019-10-14 22:01:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:17,315 INFO L225 Difference]: With dead ends: 2670 [2019-10-14 22:01:17,315 INFO L226 Difference]: Without dead ends: 2668 [2019-10-14 22:01:17,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2019-10-14 22:01:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2112. [2019-10-14 22:01:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2112 states. [2019-10-14 22:01:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3232 transitions. [2019-10-14 22:01:17,415 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3232 transitions. Word has length 222 [2019-10-14 22:01:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:17,416 INFO L462 AbstractCegarLoop]: Abstraction has 2112 states and 3232 transitions. [2019-10-14 22:01:17,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3232 transitions. [2019-10-14 22:01:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-14 22:01:17,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:17,427 INFO L380 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, 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] [2019-10-14 22:01:17,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:17,632 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:17,633 INFO L82 PathProgramCache]: Analyzing trace with hash 432586230, now seen corresponding path program 1 times [2019-10-14 22:01:17,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:17,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078051320] [2019-10-14 22:01:17,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:17,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:17,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:17,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078051320] [2019-10-14 22:01:17,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328853568] [2019-10-14 22:01:17,950 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 [2019-10-14 22:01:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:18,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:18,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:18,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:18,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:01:18,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803891033] [2019-10-14 22:01:18,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:01:18,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:18,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:01:18,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:18,207 INFO L87 Difference]: Start difference. First operand 2112 states and 3232 transitions. Second operand 11 states. [2019-10-14 22:01:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:22,907 INFO L93 Difference]: Finished difference Result 7106 states and 12855 transitions. [2019-10-14 22:01:22,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 22:01:22,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 269 [2019-10-14 22:01:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:22,942 INFO L225 Difference]: With dead ends: 7106 [2019-10-14 22:01:22,943 INFO L226 Difference]: Without dead ends: 4218 [2019-10-14 22:01:22,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:01:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2019-10-14 22:01:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 3954. [2019-10-14 22:01:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3954 states. [2019-10-14 22:01:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 5808 transitions. [2019-10-14 22:01:23,150 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 5808 transitions. Word has length 269 [2019-10-14 22:01:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:23,151 INFO L462 AbstractCegarLoop]: Abstraction has 3954 states and 5808 transitions. [2019-10-14 22:01:23,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:01:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 5808 transitions. [2019-10-14 22:01:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-14 22:01:23,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:23,163 INFO L380 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, 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] [2019-10-14 22:01:23,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:23,376 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1496918186, now seen corresponding path program 1 times [2019-10-14 22:01:23,377 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:23,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803495607] [2019-10-14 22:01:23,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:23,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:23,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:24,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803495607] [2019-10-14 22:01:24,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331211326] [2019-10-14 22:01:24,376 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 [2019-10-14 22:01:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:24,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:24,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-14 22:01:24,549 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:24,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-10-14 22:01:24,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132030143] [2019-10-14 22:01:24,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:24,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:24,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:24,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:01:24,551 INFO L87 Difference]: Start difference. First operand 3954 states and 5808 transitions. Second operand 3 states. [2019-10-14 22:01:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:25,503 INFO L93 Difference]: Finished difference Result 9022 states and 13484 transitions. [2019-10-14 22:01:25,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:25,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2019-10-14 22:01:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:25,535 INFO L225 Difference]: With dead ends: 9022 [2019-10-14 22:01:25,536 INFO L226 Difference]: Without dead ends: 5082 [2019-10-14 22:01:25,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 276 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:01:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2019-10-14 22:01:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 4894. [2019-10-14 22:01:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4894 states. [2019-10-14 22:01:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 7184 transitions. [2019-10-14 22:01:25,805 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 7184 transitions. Word has length 273 [2019-10-14 22:01:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:25,805 INFO L462 AbstractCegarLoop]: Abstraction has 4894 states and 7184 transitions. [2019-10-14 22:01:25,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 7184 transitions. [2019-10-14 22:01:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-14 22:01:25,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:25,822 INFO L380 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, 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] [2019-10-14 22:01:26,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:26,035 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1646348514, now seen corresponding path program 1 times [2019-10-14 22:01:26,036 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:26,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240108194] [2019-10-14 22:01:26,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:26,037 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:26,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:26,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240108194] [2019-10-14 22:01:26,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975428277] [2019-10-14 22:01:26,350 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 [2019-10-14 22:01:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:26,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:26,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:26,585 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:26,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:01:26,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529613247] [2019-10-14 22:01:26,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:01:26,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:01:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:26,588 INFO L87 Difference]: Start difference. First operand 4894 states and 7184 transitions. Second operand 11 states. [2019-10-14 22:01:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:30,495 INFO L93 Difference]: Finished difference Result 11050 states and 16215 transitions. [2019-10-14 22:01:30,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 22:01:30,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 281 [2019-10-14 22:01:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:30,522 INFO L225 Difference]: With dead ends: 11050 [2019-10-14 22:01:30,522 INFO L226 Difference]: Without dead ends: 5402 [2019-10-14 22:01:30,546 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:01:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2019-10-14 22:01:30,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 3844. [2019-10-14 22:01:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3844 states. [2019-10-14 22:01:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5122 transitions. [2019-10-14 22:01:30,699 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5122 transitions. Word has length 281 [2019-10-14 22:01:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:30,700 INFO L462 AbstractCegarLoop]: Abstraction has 3844 states and 5122 transitions. [2019-10-14 22:01:30,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:01:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5122 transitions. [2019-10-14 22:01:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-10-14 22:01:30,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:30,713 INFO L380 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, 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, 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] [2019-10-14 22:01:30,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:30,917 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash 977108025, now seen corresponding path program 1 times [2019-10-14 22:01:30,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:30,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163941028] [2019-10-14 22:01:30,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:30,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:30,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:31,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163941028] [2019-10-14 22:01:31,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802554547] [2019-10-14 22:01:31,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:01:31,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:31,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 22:01:32,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:32,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-14 22:01:32,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235777089] [2019-10-14 22:01:32,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:32,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:01:32,074 INFO L87 Difference]: Start difference. First operand 3844 states and 5122 transitions. Second operand 5 states. [2019-10-14 22:01:33,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:33,351 INFO L93 Difference]: Finished difference Result 6752 states and 9091 transitions. [2019-10-14 22:01:33,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:01:33,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 298 [2019-10-14 22:01:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:33,368 INFO L225 Difference]: With dead ends: 6752 [2019-10-14 22:01:33,368 INFO L226 Difference]: Without dead ends: 3848 [2019-10-14 22:01:33,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:01:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2019-10-14 22:01:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3640. [2019-10-14 22:01:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3640 states. [2019-10-14 22:01:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4790 transitions. [2019-10-14 22:01:33,464 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4790 transitions. Word has length 298 [2019-10-14 22:01:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:33,464 INFO L462 AbstractCegarLoop]: Abstraction has 3640 states and 4790 transitions. [2019-10-14 22:01:33,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4790 transitions. [2019-10-14 22:01:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-10-14 22:01:33,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:33,474 INFO L380 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, 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, 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] [2019-10-14 22:01:33,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:33,683 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1707921727, now seen corresponding path program 1 times [2019-10-14 22:01:33,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:33,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452072807] [2019-10-14 22:01:33,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:33,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:33,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 100 proven. 124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:01:34,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452072807] [2019-10-14 22:01:34,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820600416] [2019-10-14 22:01:34,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:01:34,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 22:01:34,376 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:34,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:01:34,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725291774] [2019-10-14 22:01:34,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:34,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:34,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:01:34,380 INFO L87 Difference]: Start difference. First operand 3640 states and 4790 transitions. Second operand 5 states. [2019-10-14 22:01:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:35,577 INFO L93 Difference]: Finished difference Result 6090 states and 8069 transitions. [2019-10-14 22:01:35,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:01:35,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2019-10-14 22:01:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:35,588 INFO L225 Difference]: With dead ends: 6090 [2019-10-14 22:01:35,588 INFO L226 Difference]: Without dead ends: 2848 [2019-10-14 22:01:35,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:01:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2019-10-14 22:01:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2806. [2019-10-14 22:01:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2806 states. [2019-10-14 22:01:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 3431 transitions. [2019-10-14 22:01:35,650 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 3431 transitions. Word has length 326 [2019-10-14 22:01:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:35,651 INFO L462 AbstractCegarLoop]: Abstraction has 2806 states and 3431 transitions. [2019-10-14 22:01:35,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 3431 transitions. [2019-10-14 22:01:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2019-10-14 22:01:35,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:35,661 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:35,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:35,866 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1386349439, now seen corresponding path program 1 times [2019-10-14 22:01:35,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:35,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797280053] [2019-10-14 22:01:35,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:35,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:35,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 160 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:01:37,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797280053] [2019-10-14 22:01:37,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856152773] [2019-10-14 22:01:37,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:01:37,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:37,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:01:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 326 proven. 53 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 22:01:37,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:37,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:01:37,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001472192] [2019-10-14 22:01:37,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:01:37,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:37,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:01:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:01:37,939 INFO L87 Difference]: Start difference. First operand 2806 states and 3431 transitions. Second operand 16 states.