/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/Problem14_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:57,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:57,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:57,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:14:57,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:14:57,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:14:57,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:14:57,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:14:57,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:14:57,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:14:57,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:14:57,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:14:57,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:57,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:57,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:57,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:57,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:57,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:57,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:57,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:57,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:57,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:57,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:57,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:57,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:57,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:57,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:57,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:57,681 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 19:14:57,694 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:57,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:57,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:57,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:57,696 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:57,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:57,697 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:57,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:57,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:57,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:57,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:57,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:57,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:57,698 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:57,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:57,698 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:57,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:57,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:57,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:57,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:57,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:57,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:57,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:57,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:57,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:57,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:57,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:57,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:57,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:58,000 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:58,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:58,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:58,027 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:58,027 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:58,028 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label56.c [2019-11-06 19:14:58,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890b3573f/099c9e30c08a43238a812d01cbdce71b/FLAG442ee4e27 [2019-11-06 19:14:58,703 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:58,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label56.c [2019-11-06 19:14:58,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890b3573f/099c9e30c08a43238a812d01cbdce71b/FLAG442ee4e27 [2019-11-06 19:14:58,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890b3573f/099c9e30c08a43238a812d01cbdce71b [2019-11-06 19:14:58,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:58,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:58,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:58,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:58,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:58,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:58" (1/1) ... [2019-11-06 19:14:58,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63526bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:58, skipping insertion in model container [2019-11-06 19:14:58,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:58" (1/1) ... [2019-11-06 19:14:58,945 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:59,019 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:59,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:59,587 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:59,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:59,763 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:59,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59 WrapperNode [2019-11-06 19:14:59,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:59,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:59,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:59,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:59,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:59,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:59,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:59,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:59,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (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 19:14:59,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:59,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:59,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:59,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:59,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:59,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:59,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:01,418 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:01,419 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:01,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:01 BoogieIcfgContainer [2019-11-06 19:15:01,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:01,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:01,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:01,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:01,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:58" (1/3) ... [2019-11-06 19:15:01,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37617428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:01, skipping insertion in model container [2019-11-06 19:15:01,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (2/3) ... [2019-11-06 19:15:01,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37617428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:01, skipping insertion in model container [2019-11-06 19:15:01,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:01" (3/3) ... [2019-11-06 19:15:01,445 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label56.c [2019-11-06 19:15:01,456 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:01,467 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:01,479 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:01,517 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:01,517 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:01,519 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:01,519 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:01,520 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:01,520 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:01,520 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:01,520 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:15:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 19:15:01,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:01,554 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] [2019-11-06 19:15:01,556 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash -718662862, now seen corresponding path program 1 times [2019-11-06 19:15:01,573 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:01,573 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715207283] [2019-11-06 19:15:01,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,973 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 19:15:01,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715207283] [2019-11-06 19:15:01,975 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:01,976 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:01,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207061189] [2019-11-06 19:15:01,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:01,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:02,009 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:15:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:04,820 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:15:04,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:04,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-06 19:15:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:04,843 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:15:04,843 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:15:04,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:15:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:15:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:15:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:15:04,950 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 23 [2019-11-06 19:15:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:04,950 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:15:04,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:15:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 19:15:04,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:04,957 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:15:04,957 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1766651886, now seen corresponding path program 1 times [2019-11-06 19:15:04,958 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:04,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459598986] [2019-11-06 19:15:04,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:05,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459598986] [2019-11-06 19:15:05,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:05,398 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:15:05,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785580342] [2019-11-06 19:15:05,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:15:05,401 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:15:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:05,402 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:15:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:07,451 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-11-06 19:15:07,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:15:07,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2019-11-06 19:15:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:07,459 INFO L225 Difference]: With dead ends: 1320 [2019-11-06 19:15:07,460 INFO L226 Difference]: Without dead ends: 768 [2019-11-06 19:15:07,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-06 19:15:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-11-06 19:15:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:15:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-11-06 19:15:07,497 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 109 [2019-11-06 19:15:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:07,497 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-11-06 19:15:07,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:15:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-11-06 19:15:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 19:15:07,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:07,502 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:15:07,503 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:07,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1723912061, now seen corresponding path program 1 times [2019-11-06 19:15:07,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:07,504 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186837089] [2019-11-06 19:15:07,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:07,717 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186837089] [2019-11-06 19:15:07,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794225693] [2019-11-06 19:15:07,719 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 19:15:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:07,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:07,880 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:07,881 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:07,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494093708] [2019-11-06 19:15:07,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:07,882 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:07,883 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-11-06 19:15:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:08,749 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-11-06 19:15:08,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:08,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-11-06 19:15:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:08,761 INFO L225 Difference]: With dead ends: 1680 [2019-11-06 19:15:08,762 INFO L226 Difference]: Without dead ends: 1120 [2019-11-06 19:15:08,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-11-06 19:15:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-11-06 19:15:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-11-06 19:15:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-11-06 19:15:08,820 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 118 [2019-11-06 19:15:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:08,822 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-11-06 19:15:08,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-11-06 19:15:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-06 19:15:08,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:08,839 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:09,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:09,040 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1179660994, now seen corresponding path program 1 times [2019-11-06 19:15:09,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:09,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362151763] [2019-11-06 19:15:09,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:15:09,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362151763] [2019-11-06 19:15:09,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250439842] [2019-11-06 19:15:09,381 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 19:15:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:09,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:15:09,599 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:09,599 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:09,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986400089] [2019-11-06 19:15:09,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:09,604 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:09,605 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-11-06 19:15:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:10,513 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-11-06 19:15:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:10,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2019-11-06 19:15:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:10,524 INFO L225 Difference]: With dead ends: 2414 [2019-11-06 19:15:10,524 INFO L226 Difference]: Without dead ends: 1486 [2019-11-06 19:15:10,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-11-06 19:15:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-11-06 19:15:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-11-06 19:15:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-11-06 19:15:10,618 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 221 [2019-11-06 19:15:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:10,620 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-11-06 19:15:10,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-11-06 19:15:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-11-06 19:15:10,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:10,626 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:15:10,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:10,830 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash -718289567, now seen corresponding path program 1 times [2019-11-06 19:15:10,831 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:10,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591440196] [2019-11-06 19:15:10,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 120 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:11,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591440196] [2019-11-06 19:15:11,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480514824] [2019-11-06 19:15:11,205 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 19:15:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:15:11,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:11,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-06 19:15:11,493 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:11,493 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-11-06 19:15:11,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304578993] [2019-11-06 19:15:11,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:11,495 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:15:11,496 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 5 states. [2019-11-06 19:15:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:12,853 INFO L93 Difference]: Finished difference Result 3012 states and 4056 transitions. [2019-11-06 19:15:12,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:12,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-11-06 19:15:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:12,864 INFO L225 Difference]: With dead ends: 3012 [2019-11-06 19:15:12,864 INFO L226 Difference]: Without dead ends: 1714 [2019-11-06 19:15:12,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:15:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2019-11-06 19:15:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1696. [2019-11-06 19:15:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2019-11-06 19:15:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2179 transitions. [2019-11-06 19:15:12,917 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2179 transitions. Word has length 240 [2019-11-06 19:15:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:12,918 INFO L462 AbstractCegarLoop]: Abstraction has 1696 states and 2179 transitions. [2019-11-06 19:15:12,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2179 transitions. [2019-11-06 19:15:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-11-06 19:15:12,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:12,925 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:13,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:13,137 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash -528490103, now seen corresponding path program 1 times [2019-11-06 19:15:13,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:13,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911923082] [2019-11-06 19:15:13,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 58 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:15:14,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911923082] [2019-11-06 19:15:14,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17272813] [2019-11-06 19:15:14,349 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 19:15:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:15:14,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:14,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 251 proven. 53 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-06 19:15:14,779 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:14,780 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:15:14,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596912021] [2019-11-06 19:15:14,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:15:14,781 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:14,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:15:14,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:15:14,782 INFO L87 Difference]: Start difference. First operand 1696 states and 2179 transitions. Second operand 16 states. [2019-11-06 19:15:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:19,087 INFO L93 Difference]: Finished difference Result 3712 states and 4777 transitions. [2019-11-06 19:15:19,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:15:19,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 324 [2019-11-06 19:15:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:19,097 INFO L225 Difference]: With dead ends: 3712 [2019-11-06 19:15:19,097 INFO L226 Difference]: Without dead ends: 1975 [2019-11-06 19:15:19,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:15:19,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2019-11-06 19:15:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1890. [2019-11-06 19:15:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2019-11-06 19:15:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2225 transitions. [2019-11-06 19:15:19,159 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2225 transitions. Word has length 324 [2019-11-06 19:15:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:19,159 INFO L462 AbstractCegarLoop]: Abstraction has 1890 states and 2225 transitions. [2019-11-06 19:15:19,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:15:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2225 transitions. [2019-11-06 19:15:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-11-06 19:15:19,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:19,167 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:19,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:19,378 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:19,378 INFO L82 PathProgramCache]: Analyzing trace with hash 288228474, now seen corresponding path program 1 times [2019-11-06 19:15:19,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:19,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616699749] [2019-11-06 19:15:19,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 119 proven. 245 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:15:20,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616699749] [2019-11-06 19:15:20,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149252835] [2019-11-06 19:15:20,193 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 [2019-11-06 19:15:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:15:20,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:20,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:15:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-06 19:15:20,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:20,439 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2019-11-06 19:15:20,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709320927] [2019-11-06 19:15:20,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:20,440 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:20,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:20,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:15:20,441 INFO L87 Difference]: Start difference. First operand 1890 states and 2225 transitions. Second operand 5 states. [2019-11-06 19:15:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:21,526 INFO L93 Difference]: Finished difference Result 4536 states and 5465 transitions. [2019-11-06 19:15:21,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:21,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2019-11-06 19:15:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:21,541 INFO L225 Difference]: With dead ends: 4536 [2019-11-06 19:15:21,541 INFO L226 Difference]: Without dead ends: 2652 [2019-11-06 19:15:21,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2019-11-06 19:15:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2019-11-06 19:15:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2466. [2019-11-06 19:15:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2466 states. [2019-11-06 19:15:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 2938 transitions. [2019-11-06 19:15:21,636 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 2938 transitions. Word has length 349 [2019-11-06 19:15:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:21,636 INFO L462 AbstractCegarLoop]: Abstraction has 2466 states and 2938 transitions. [2019-11-06 19:15:21,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 2938 transitions. [2019-11-06 19:15:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2019-11-06 19:15:21,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:21,647 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:21,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:21,852 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1335459558, now seen corresponding path program 1 times [2019-11-06 19:15:21,852 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:21,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911878216] [2019-11-06 19:15:21,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 290 proven. 104 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-11-06 19:15:22,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911878216] [2019-11-06 19:15:22,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577517263] [2019-11-06 19:15:22,667 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 [2019-11-06 19:15:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:22,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 582 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-06 19:15:22,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:22,945 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:15:22,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871751503] [2019-11-06 19:15:22,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:15:22,946 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:22,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:15:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:22,947 INFO L87 Difference]: Start difference. First operand 2466 states and 2938 transitions. Second operand 9 states. [2019-11-06 19:15:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:25,068 INFO L93 Difference]: Finished difference Result 4760 states and 5717 transitions. [2019-11-06 19:15:25,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:15:25,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 459 [2019-11-06 19:15:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:25,077 INFO L225 Difference]: With dead ends: 4760 [2019-11-06 19:15:25,078 INFO L226 Difference]: Without dead ends: 2482 [2019-11-06 19:15:25,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2019-11-06 19:15:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2472. [2019-11-06 19:15:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2019-11-06 19:15:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 2841 transitions. [2019-11-06 19:15:25,142 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 2841 transitions. Word has length 459 [2019-11-06 19:15:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:25,143 INFO L462 AbstractCegarLoop]: Abstraction has 2472 states and 2841 transitions. [2019-11-06 19:15:25,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:15:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 2841 transitions. [2019-11-06 19:15:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2019-11-06 19:15:25,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:25,161 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:25,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:25,369 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:25,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1386217842, now seen corresponding path program 1 times [2019-11-06 19:15:25,370 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:25,370 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385168107] [2019-11-06 19:15:25,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 398 proven. 112 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2019-11-06 19:15:27,424 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385168107] [2019-11-06 19:15:27,424 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376261602] [2019-11-06 19:15:27,424 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 [2019-11-06 19:15:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:15:27,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:27,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 769 proven. 2 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-06 19:15:27,968 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:27,968 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:15:27,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645159780] [2019-11-06 19:15:27,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:15:27,969 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:27,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:15:27,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:15:27,970 INFO L87 Difference]: Start difference. First operand 2472 states and 2841 transitions. Second operand 12 states. [2019-11-06 19:15:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:30,128 INFO L93 Difference]: Finished difference Result 5042 states and 5813 transitions. [2019-11-06 19:15:30,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:15:30,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 543 [2019-11-06 19:15:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:30,139 INFO L225 Difference]: With dead ends: 5042 [2019-11-06 19:15:30,139 INFO L226 Difference]: Without dead ends: 2717 [2019-11-06 19:15:30,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 562 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:15:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2019-11-06 19:15:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2464. [2019-11-06 19:15:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2464 states. [2019-11-06 19:15:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2740 transitions. [2019-11-06 19:15:30,197 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2740 transitions. Word has length 543 [2019-11-06 19:15:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:30,198 INFO L462 AbstractCegarLoop]: Abstraction has 2464 states and 2740 transitions. [2019-11-06 19:15:30,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:15:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2740 transitions. [2019-11-06 19:15:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2019-11-06 19:15:30,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:30,205 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:30,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:30,409 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:30,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1445260346, now seen corresponding path program 2 times [2019-11-06 19:15:30,411 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:30,411 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280265521] [2019-11-06 19:15:30,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 621 proven. 224 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-11-06 19:15:31,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280265521] [2019-11-06 19:15:31,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837024674] [2019-11-06 19:15:31,521 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:31,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:15:31,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:15:31,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:31,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:31,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 816 proven. 2 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-11-06 19:15:31,992 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:31,992 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:15:31,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226521528] [2019-11-06 19:15:31,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:15:31,993 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:15:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:15:31,994 INFO L87 Difference]: Start difference. First operand 2464 states and 2740 transitions. Second operand 17 states.