/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:22:05,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:22:05,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:22:05,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:22:05,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:22:05,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:22:05,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:22:05,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:22:05,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:22:05,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:22:05,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:22:05,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:22:05,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:22:05,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:22:05,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:22:05,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:22:05,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:22:05,371 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 [2019-11-23 21:22:05,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:22:05,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:22:05,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:22:05,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:22:05,390 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:22:05,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:22:05,391 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:22:05,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:22:05,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:22:05,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:22:05,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:22:05,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:22:05,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:22:05,392 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:22:05,392 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:22:05,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:22:05,393 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:22:05,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:22:05,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:22:05,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:22:05,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:22:05,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:22:05,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:22:05,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:22:05,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:22:05,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:22:05,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:22:05,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:22:05,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:22:05,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:22:05,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:22:05,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:22:05,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:22:05,732 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:22:05,732 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:22:05,734 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-11-23 21:22:05,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f88d31/9dfa0a7c536741a8afbd712ca16a3c7f/FLAG5fe23ae03 [2019-11-23 21:22:06,599 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:22:06,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-11-23 21:22:06,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f88d31/9dfa0a7c536741a8afbd712ca16a3c7f/FLAG5fe23ae03 [2019-11-23 21:22:06,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f88d31/9dfa0a7c536741a8afbd712ca16a3c7f [2019-11-23 21:22:06,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:22:06,694 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:22:06,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:06,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:22:06,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:22:06,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:06" (1/1) ... [2019-11-23 21:22:06,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1348e435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:06, skipping insertion in model container [2019-11-23 21:22:06,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:06" (1/1) ... [2019-11-23 21:22:06,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:22:06,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:22:07,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:07,976 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:22:08,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:08,558 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:22:08,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08 WrapperNode [2019-11-23 21:22:08,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:08,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:08,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:22:08,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:22:08,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:08,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:08,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:08,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:22:08,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:22:08,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:22:08,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:08,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:08,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:08,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:08,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:08,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:09,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (1/1) ... [2019-11-23 21:22:09,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:22:09,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:22:09,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:22:09,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:22:09,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (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 [2019-11-23 21:22:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:22:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:22:13,017 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:22:13,017 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:22:13,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:13 BoogieIcfgContainer [2019-11-23 21:22:13,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:22:13,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:22:13,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:22:13,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:22:13,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:06" (1/3) ... [2019-11-23 21:22:13,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d1a89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:13, skipping insertion in model container [2019-11-23 21:22:13,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:08" (2/3) ... [2019-11-23 21:22:13,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d1a89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:13, skipping insertion in model container [2019-11-23 21:22:13,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:13" (3/3) ... [2019-11-23 21:22:13,027 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label18.c [2019-11-23 21:22:13,036 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:22:13,044 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:22:13,056 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:22:13,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:22:13,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:22:13,100 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:22:13,100 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:22:13,100 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:22:13,101 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:22:13,101 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:22:13,101 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:22:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:22:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 21:22:13,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:13,154 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:13,155 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash -66916295, now seen corresponding path program 1 times [2019-11-23 21:22:13,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:13,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900545057] [2019-11-23 21:22:13,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:22:13,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900545057] [2019-11-23 21:22:13,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:13,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:22:13,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762501255] [2019-11-23 21:22:13,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:13,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:13,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:13,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:13,544 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:22:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:20,748 INFO L93 Difference]: Finished difference Result 2914 states and 5662 transitions. [2019-11-23 21:22:20,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:20,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2019-11-23 21:22:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:20,801 INFO L225 Difference]: With dead ends: 2914 [2019-11-23 21:22:20,801 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:22:20,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:22:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:22:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:22:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3418 transitions. [2019-11-23 21:22:20,970 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3418 transitions. Word has length 57 [2019-11-23 21:22:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:20,971 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3418 transitions. [2019-11-23 21:22:20,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3418 transitions. [2019-11-23 21:22:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-23 21:22:20,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:20,983 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:20,984 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1390911190, now seen corresponding path program 1 times [2019-11-23 21:22:20,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:20,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486705392] [2019-11-23 21:22:20,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:22:21,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486705392] [2019-11-23 21:22:21,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:21,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:22:21,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084571731] [2019-11-23 21:22:21,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:21,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:21,213 INFO L87 Difference]: Start difference. First operand 2074 states and 3418 transitions. Second operand 4 states. [2019-11-23 21:22:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:25,430 INFO L93 Difference]: Finished difference Result 6216 states and 10249 transitions. [2019-11-23 21:22:25,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:25,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-11-23 21:22:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:25,453 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:22:25,454 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:22:25,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:22:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:22:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:22:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5717 transitions. [2019-11-23 21:22:25,547 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5717 transitions. Word has length 122 [2019-11-23 21:22:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:25,548 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5717 transitions. [2019-11-23 21:22:25,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5717 transitions. [2019-11-23 21:22:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-11-23 21:22:25,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:25,552 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 21:22:25,552 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash -184180334, now seen corresponding path program 1 times [2019-11-23 21:22:25,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:25,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443780192] [2019-11-23 21:22:25,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 21:22:26,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443780192] [2019-11-23 21:22:26,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:26,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:26,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368711594] [2019-11-23 21:22:26,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:22:26,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:22:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:22:26,075 INFO L87 Difference]: Start difference. First operand 4144 states and 5717 transitions. Second operand 5 states. [2019-11-23 21:22:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:31,883 INFO L93 Difference]: Finished difference Result 11736 states and 15752 transitions. [2019-11-23 21:22:31,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:31,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-11-23 21:22:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:31,917 INFO L225 Difference]: With dead ends: 11736 [2019-11-23 21:22:31,917 INFO L226 Difference]: Without dead ends: 7594 [2019-11-23 21:22:31,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2019-11-23 21:22:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6904. [2019-11-23 21:22:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6904 states. [2019-11-23 21:22:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8699 transitions. [2019-11-23 21:22:32,045 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8699 transitions. Word has length 240 [2019-11-23 21:22:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:32,046 INFO L462 AbstractCegarLoop]: Abstraction has 6904 states and 8699 transitions. [2019-11-23 21:22:32,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:22:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8699 transitions. [2019-11-23 21:22:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2019-11-23 21:22:32,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:32,053 INFO L410 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:32,053 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1687638182, now seen corresponding path program 1 times [2019-11-23 21:22:32,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:32,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266551745] [2019-11-23 21:22:32,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 334 proven. 3 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 21:22:32,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266551745] [2019-11-23 21:22:32,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550978368] [2019-11-23 21:22:32,804 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 [2019-11-23 21:22:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:32,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:32,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:22:33,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:33,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:33,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792031584] [2019-11-23 21:22:33,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:33,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:33,222 INFO L87 Difference]: Start difference. First operand 6904 states and 8699 transitions. Second operand 3 states. [2019-11-23 21:22:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:37,154 INFO L93 Difference]: Finished difference Result 17256 states and 22359 transitions. [2019-11-23 21:22:37,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:37,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 422 [2019-11-23 21:22:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:37,196 INFO L225 Difference]: With dead ends: 17256 [2019-11-23 21:22:37,196 INFO L226 Difference]: Without dead ends: 10354 [2019-11-23 21:22:37,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 421 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10354 states. [2019-11-23 21:22:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10354 to 10354. [2019-11-23 21:22:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10354 states. [2019-11-23 21:22:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 13164 transitions. [2019-11-23 21:22:37,377 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 13164 transitions. Word has length 422 [2019-11-23 21:22:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:37,378 INFO L462 AbstractCegarLoop]: Abstraction has 10354 states and 13164 transitions. [2019-11-23 21:22:37,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 13164 transitions. [2019-11-23 21:22:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2019-11-23 21:22:37,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:37,387 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:37,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:37,592 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1911888359, now seen corresponding path program 1 times [2019-11-23 21:22:37,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:37,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505621288] [2019-11-23 21:22:37,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-23 21:22:38,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505621288] [2019-11-23 21:22:38,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948368493] [2019-11-23 21:22:38,291 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 [2019-11-23 21:22:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:38,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:38,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 21:22:38,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:38,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:22:38,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119648682] [2019-11-23 21:22:38,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:38,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:22:38,562 INFO L87 Difference]: Start difference. First operand 10354 states and 13164 transitions. Second operand 3 states. [2019-11-23 21:22:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:42,545 INFO L93 Difference]: Finished difference Result 29676 states and 37987 transitions. [2019-11-23 21:22:42,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:42,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 428 [2019-11-23 21:22:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:42,598 INFO L225 Difference]: With dead ends: 29676 [2019-11-23 21:22:42,598 INFO L226 Difference]: Without dead ends: 19324 [2019-11-23 21:22:42,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:22:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19324 states. [2019-11-23 21:22:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19324 to 18634. [2019-11-23 21:22:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18634 states. [2019-11-23 21:22:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 23568 transitions. [2019-11-23 21:22:42,905 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 23568 transitions. Word has length 428 [2019-11-23 21:22:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:42,907 INFO L462 AbstractCegarLoop]: Abstraction has 18634 states and 23568 transitions. [2019-11-23 21:22:42,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 23568 transitions. [2019-11-23 21:22:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2019-11-23 21:22:42,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:42,918 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:43,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:43,131 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1898926872, now seen corresponding path program 1 times [2019-11-23 21:22:43,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:43,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742555519] [2019-11-23 21:22:43,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:22:44,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742555519] [2019-11-23 21:22:44,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:44,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:44,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096761158] [2019-11-23 21:22:44,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:44,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:44,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:44,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:44,286 INFO L87 Difference]: Start difference. First operand 18634 states and 23568 transitions. Second operand 4 states. [2019-11-23 21:22:50,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:50,219 INFO L93 Difference]: Finished difference Result 55896 states and 71647 transitions. [2019-11-23 21:22:50,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:50,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 463 [2019-11-23 21:22:50,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:50,300 INFO L225 Difference]: With dead ends: 55896 [2019-11-23 21:22:50,300 INFO L226 Difference]: Without dead ends: 37264 [2019-11-23 21:22:50,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37264 states. [2019-11-23 21:22:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37264 to 34504. [2019-11-23 21:22:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34504 states. [2019-11-23 21:22:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 43325 transitions. [2019-11-23 21:22:50,929 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 43325 transitions. Word has length 463 [2019-11-23 21:22:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:50,930 INFO L462 AbstractCegarLoop]: Abstraction has 34504 states and 43325 transitions. [2019-11-23 21:22:50,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 43325 transitions. [2019-11-23 21:22:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2019-11-23 21:22:50,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:50,954 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:50,954 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:50,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1848119868, now seen corresponding path program 1 times [2019-11-23 21:22:50,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:50,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521878381] [2019-11-23 21:22:50,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 570 proven. 3 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-11-23 21:22:52,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521878381] [2019-11-23 21:22:52,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5469563] [2019-11-23 21:22:52,099 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 [2019-11-23 21:22:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:52,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:52,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 669 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-23 21:22:52,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:52,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:52,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744522312] [2019-11-23 21:22:52,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:52,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:52,467 INFO L87 Difference]: Start difference. First operand 34504 states and 43325 transitions. Second operand 3 states. [2019-11-23 21:22:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:56,342 INFO L93 Difference]: Finished difference Result 71766 states and 89678 transitions. [2019-11-23 21:22:56,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:56,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 624 [2019-11-23 21:22:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:56,383 INFO L225 Difference]: With dead ends: 71766 [2019-11-23 21:22:56,384 INFO L226 Difference]: Without dead ends: 33814 [2019-11-23 21:22:56,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 623 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33814 states. [2019-11-23 21:22:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33814 to 32434. [2019-11-23 21:22:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32434 states. [2019-11-23 21:22:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32434 states to 32434 states and 34844 transitions. [2019-11-23 21:22:56,792 INFO L78 Accepts]: Start accepts. Automaton has 32434 states and 34844 transitions. Word has length 624 [2019-11-23 21:22:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:56,793 INFO L462 AbstractCegarLoop]: Abstraction has 32434 states and 34844 transitions. [2019-11-23 21:22:56,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 32434 states and 34844 transitions. [2019-11-23 21:22:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2019-11-23 21:22:56,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:56,827 INFO L410 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 21:22:57,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:57,033 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -265317607, now seen corresponding path program 1 times [2019-11-23 21:22:57,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:57,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007008024] [2019-11-23 21:22:57,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 21:22:57,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007008024] [2019-11-23 21:22:57,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:57,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:57,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855593684] [2019-11-23 21:22:58,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:58,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:58,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:58,003 INFO L87 Difference]: Start difference. First operand 32434 states and 34844 transitions. Second operand 4 states. [2019-11-23 21:23:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:03,048 INFO L93 Difference]: Finished difference Result 77286 states and 83293 transitions. [2019-11-23 21:23:03,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:03,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 725 [2019-11-23 21:23:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:03,098 INFO L225 Difference]: With dead ends: 77286 [2019-11-23 21:23:03,098 INFO L226 Difference]: Without dead ends: 44854 [2019-11-23 21:23:03,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44854 states. [2019-11-23 21:23:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44854 to 42094. [2019-11-23 21:23:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42094 states. [2019-11-23 21:23:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 44538 transitions. [2019-11-23 21:23:03,522 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 44538 transitions. Word has length 725 [2019-11-23 21:23:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:03,523 INFO L462 AbstractCegarLoop]: Abstraction has 42094 states and 44538 transitions. [2019-11-23 21:23:03,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 44538 transitions. [2019-11-23 21:23:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2019-11-23 21:23:03,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:03,542 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:23:03,542 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:03,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1182203951, now seen corresponding path program 1 times [2019-11-23 21:23:03,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:03,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48999882] [2019-11-23 21:23:03,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 226 proven. 569 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-23 21:23:04,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48999882] [2019-11-23 21:23:04,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127942559] [2019-11-23 21:23:04,709 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 [2019-11-23 21:23:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:04,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:04,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2019-11-23 21:23:05,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:05,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:23:05,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493708982] [2019-11-23 21:23:05,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:05,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:23:05,600 INFO L87 Difference]: Start difference. First operand 42094 states and 44538 transitions. Second operand 3 states. [2019-11-23 21:23:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:08,224 INFO L93 Difference]: Finished difference Result 84186 states and 89074 transitions. [2019-11-23 21:23:08,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:08,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 744 [2019-11-23 21:23:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:08,272 INFO L225 Difference]: With dead ends: 84186 [2019-11-23 21:23:08,272 INFO L226 Difference]: Without dead ends: 42094 [2019-11-23 21:23:08,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 743 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:23:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2019-11-23 21:23:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 40024. [2019-11-23 21:23:08,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40024 states. [2019-11-23 21:23:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 41687 transitions. [2019-11-23 21:23:08,653 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 41687 transitions. Word has length 744 [2019-11-23 21:23:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:08,654 INFO L462 AbstractCegarLoop]: Abstraction has 40024 states and 41687 transitions. [2019-11-23 21:23:08,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 41687 transitions. [2019-11-23 21:23:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2019-11-23 21:23:08,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:08,682 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:23:08,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:08,887 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:08,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1947865137, now seen corresponding path program 1 times [2019-11-23 21:23:08,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:08,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412958524] [2019-11-23 21:23:08,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2019-11-23 21:23:10,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412958524] [2019-11-23 21:23:10,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:10,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:10,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865157150] [2019-11-23 21:23:10,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:10,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:10,922 INFO L87 Difference]: Start difference. First operand 40024 states and 41687 transitions. Second operand 4 states. [2019-11-23 21:23:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:15,450 INFO L93 Difference]: Finished difference Result 99366 states and 104155 transitions. [2019-11-23 21:23:15,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:15,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 939 [2019-11-23 21:23:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:15,498 INFO L225 Difference]: With dead ends: 99366 [2019-11-23 21:23:15,498 INFO L226 Difference]: Without dead ends: 55894 [2019-11-23 21:23:15,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55894 states. [2019-11-23 21:23:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55894 to 53134. [2019-11-23 21:23:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53134 states. [2019-11-23 21:23:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53134 states to 53134 states and 55198 transitions. [2019-11-23 21:23:15,947 INFO L78 Accepts]: Start accepts. Automaton has 53134 states and 55198 transitions. Word has length 939 [2019-11-23 21:23:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:15,948 INFO L462 AbstractCegarLoop]: Abstraction has 53134 states and 55198 transitions. [2019-11-23 21:23:15,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 53134 states and 55198 transitions. [2019-11-23 21:23:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1209 [2019-11-23 21:23:15,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:15,986 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:15,986 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:15,987 INFO L82 PathProgramCache]: Analyzing trace with hash -674437032, now seen corresponding path program 1 times [2019-11-23 21:23:15,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:15,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597365133] [2019-11-23 21:23:15,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 1234 proven. 198 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-23 21:23:18,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597365133] [2019-11-23 21:23:18,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54305333] [2019-11-23 21:23:18,499 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 [2019-11-23 21:23:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:18,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:18,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 976 proven. 0 refuted. 0 times theorem prover too weak. 794 trivial. 0 not checked. [2019-11-23 21:23:19,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:19,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2019-11-23 21:23:19,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092020514] [2019-11-23 21:23:19,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:19,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:23:19,770 INFO L87 Difference]: Start difference. First operand 53134 states and 55198 transitions. Second operand 3 states.