/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/Problem15_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:15:27,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:15:27,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:15:27,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:15:27,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:15:27,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:15:27,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:15:27,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:15:27,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:15:27,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:15:27,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:15:27,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:15:27,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:15:27,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:15:27,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:15:27,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:15:27,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:15:27,356 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 21:15:27,369 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:15:27,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:15:27,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:15:27,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:15:27,371 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:15:27,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:15:27,371 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:15:27,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:15:27,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:15:27,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:15:27,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:15:27,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:15:27,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:15:27,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:15:27,373 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:15:27,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:15:27,373 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:15:27,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:15:27,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:15:27,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:15:27,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:15:27,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:15:27,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:15:27,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:15:27,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:15:27,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:15:27,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:15:27,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:15:27,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:15:27,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:15:27,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:15:27,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:15:27,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:15:27,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:15:27,673 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:15:27,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-11-23 21:15:27,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1af3d179/f2869a55768c4c3fb8cb99de16e5e6e7/FLAG965b36f8f [2019-11-23 21:15:28,399 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:15:28,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-11-23 21:15:28,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1af3d179/f2869a55768c4c3fb8cb99de16e5e6e7/FLAG965b36f8f [2019-11-23 21:15:28,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1af3d179/f2869a55768c4c3fb8cb99de16e5e6e7 [2019-11-23 21:15:28,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:15:28,591 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:15:28,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:15:28,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:15:28,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:15:28,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:28" (1/1) ... [2019-11-23 21:15:28,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26810287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:28, skipping insertion in model container [2019-11-23 21:15:28,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:28" (1/1) ... [2019-11-23 21:15:28,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:15:28,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:15:29,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:15:29,529 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:15:29,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:15:29,875 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:15:29,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29 WrapperNode [2019-11-23 21:15:29,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:15:29,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:15:29,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:15:29,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:15:29,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:29,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:15:30,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:15:30,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:15:30,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:15:30,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (1/1) ... [2019-11-23 21:15:30,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:15:30,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:15:30,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:15:30,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:15:30,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (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 21:15:30,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:15:30,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:15:34,331 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:15:34,331 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:15:34,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:34 BoogieIcfgContainer [2019-11-23 21:15:34,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:15:34,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:15:34,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:15:34,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:15:34,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:28" (1/3) ... [2019-11-23 21:15:34,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19673109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:34, skipping insertion in model container [2019-11-23 21:15:34,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:29" (2/3) ... [2019-11-23 21:15:34,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19673109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:34, skipping insertion in model container [2019-11-23 21:15:34,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:34" (3/3) ... [2019-11-23 21:15:34,401 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2019-11-23 21:15:34,411 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:15:34,419 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:15:34,428 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:15:34,472 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:15:34,472 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:15:34,473 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:15:34,473 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:15:34,473 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:15:34,474 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:15:34,474 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:15:34,475 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:15:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states. [2019-11-23 21:15:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 21:15:34,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:34,513 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] [2019-11-23 21:15:34,513 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2019-11-23 21:15:34,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:34,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165514752] [2019-11-23 21:15:34,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:34,790 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 21:15:34,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165514752] [2019-11-23 21:15:34,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:34,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:15:34,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477733652] [2019-11-23 21:15:34,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:15:34,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:34,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:15:34,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:34,817 INFO L87 Difference]: Start difference. First operand 424 states. Second operand 4 states. [2019-11-23 21:15:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:39,623 INFO L93 Difference]: Finished difference Result 1466 states and 2715 transitions. [2019-11-23 21:15:39,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:39,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-11-23 21:15:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:39,652 INFO L225 Difference]: With dead ends: 1466 [2019-11-23 21:15:39,652 INFO L226 Difference]: Without dead ends: 974 [2019-11-23 21:15:39,658 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 21:15:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2019-11-23 21:15:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 972. [2019-11-23 21:15:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2019-11-23 21:15:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1407 transitions. [2019-11-23 21:15:39,757 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1407 transitions. Word has length 36 [2019-11-23 21:15:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:39,758 INFO L462 AbstractCegarLoop]: Abstraction has 972 states and 1407 transitions. [2019-11-23 21:15:39,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1407 transitions. [2019-11-23 21:15:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 21:15:39,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:39,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:39,763 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1797553213, now seen corresponding path program 1 times [2019-11-23 21:15:39,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:39,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311289520] [2019-11-23 21:15:39,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:40,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311289520] [2019-11-23 21:15:40,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:40,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:15:40,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244845503] [2019-11-23 21:15:40,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:15:40,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:40,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:15:40,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:40,006 INFO L87 Difference]: Start difference. First operand 972 states and 1407 transitions. Second operand 4 states. [2019-11-23 21:15:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:44,616 INFO L93 Difference]: Finished difference Result 3747 states and 5437 transitions. [2019-11-23 21:15:44,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:44,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2019-11-23 21:15:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:44,632 INFO L225 Difference]: With dead ends: 3747 [2019-11-23 21:15:44,633 INFO L226 Difference]: Without dead ends: 2777 [2019-11-23 21:15:44,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 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 21:15:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2019-11-23 21:15:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2775. [2019-11-23 21:15:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2775 states. [2019-11-23 21:15:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 3624 transitions. [2019-11-23 21:15:44,786 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 3624 transitions. Word has length 101 [2019-11-23 21:15:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:44,787 INFO L462 AbstractCegarLoop]: Abstraction has 2775 states and 3624 transitions. [2019-11-23 21:15:44,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 3624 transitions. [2019-11-23 21:15:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-23 21:15:44,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:44,794 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:44,794 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1703382585, now seen corresponding path program 1 times [2019-11-23 21:15:44,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:44,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031007960] [2019-11-23 21:15:44,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 67 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 21:15:45,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031007960] [2019-11-23 21:15:45,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348652354] [2019-11-23 21:15:45,127 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 21:15:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:45,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:45,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:45,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:45,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:15:45,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304949404] [2019-11-23 21:15:45,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:45,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:45,304 INFO L87 Difference]: Start difference. First operand 2775 states and 3624 transitions. Second operand 3 states. [2019-11-23 21:15:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:47,861 INFO L93 Difference]: Finished difference Result 7941 states and 10408 transitions. [2019-11-23 21:15:47,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:47,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2019-11-23 21:15:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:47,890 INFO L225 Difference]: With dead ends: 7941 [2019-11-23 21:15:47,890 INFO L226 Difference]: Without dead ends: 5168 [2019-11-23 21:15:47,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 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 21:15:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2019-11-23 21:15:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 3073. [2019-11-23 21:15:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3073 states. [2019-11-23 21:15:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 3976 transitions. [2019-11-23 21:15:47,986 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 3976 transitions. Word has length 206 [2019-11-23 21:15:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:47,990 INFO L462 AbstractCegarLoop]: Abstraction has 3073 states and 3976 transitions. [2019-11-23 21:15:47,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 3976 transitions. [2019-11-23 21:15:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-11-23 21:15:48,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:48,003 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:48,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:48,207 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 815863459, now seen corresponding path program 1 times [2019-11-23 21:15:48,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:48,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104855098] [2019-11-23 21:15:48,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 21:15:48,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104855098] [2019-11-23 21:15:48,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:48,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:15:48,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329818911] [2019-11-23 21:15:48,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:15:48,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:15:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:15:48,905 INFO L87 Difference]: Start difference. First operand 3073 states and 3976 transitions. Second operand 5 states. [2019-11-23 21:15:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:54,036 INFO L93 Difference]: Finished difference Result 7342 states and 9252 transitions. [2019-11-23 21:15:54,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:54,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2019-11-23 21:15:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:54,058 INFO L225 Difference]: With dead ends: 7342 [2019-11-23 21:15:54,058 INFO L226 Difference]: Without dead ends: 4271 [2019-11-23 21:15:54,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:15:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2019-11-23 21:15:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 3971. [2019-11-23 21:15:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3971 states. [2019-11-23 21:15:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 4928 transitions. [2019-11-23 21:15:54,135 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 4928 transitions. Word has length 386 [2019-11-23 21:15:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:54,136 INFO L462 AbstractCegarLoop]: Abstraction has 3971 states and 4928 transitions. [2019-11-23 21:15:54,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:15:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 4928 transitions. [2019-11-23 21:15:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2019-11-23 21:15:54,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:54,147 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:54,147 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:54,147 INFO L82 PathProgramCache]: Analyzing trace with hash -63412363, now seen corresponding path program 1 times [2019-11-23 21:15:54,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:54,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701112712] [2019-11-23 21:15:54,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 21:15:54,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701112712] [2019-11-23 21:15:54,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:54,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:15:54,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166792725] [2019-11-23 21:15:54,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:15:54,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:54,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:15:54,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:54,580 INFO L87 Difference]: Start difference. First operand 3971 states and 4928 transitions. Second operand 4 states. [2019-11-23 21:15:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:58,263 INFO L93 Difference]: Finished difference Result 9742 states and 12308 transitions. [2019-11-23 21:15:58,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:58,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2019-11-23 21:15:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:58,293 INFO L225 Difference]: With dead ends: 9742 [2019-11-23 21:15:58,293 INFO L226 Difference]: Without dead ends: 5773 [2019-11-23 21:15:58,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 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 21:15:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5773 states. [2019-11-23 21:15:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5773 to 5470. [2019-11-23 21:15:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5470 states. [2019-11-23 21:15:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 6685 transitions. [2019-11-23 21:15:58,398 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 6685 transitions. Word has length 460 [2019-11-23 21:15:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:58,399 INFO L462 AbstractCegarLoop]: Abstraction has 5470 states and 6685 transitions. [2019-11-23 21:15:58,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 6685 transitions. [2019-11-23 21:15:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2019-11-23 21:15:58,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:58,410 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:58,410 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash -56215097, now seen corresponding path program 1 times [2019-11-23 21:15:58,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:58,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401594029] [2019-11-23 21:15:58,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 21:15:58,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401594029] [2019-11-23 21:15:58,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:58,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:15:58,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727213167] [2019-11-23 21:15:58,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:15:58,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:15:58,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:58,867 INFO L87 Difference]: Start difference. First operand 5470 states and 6685 transitions. Second operand 4 states. [2019-11-23 21:16:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:01,803 INFO L93 Difference]: Finished difference Result 10937 states and 13389 transitions. [2019-11-23 21:16:01,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:16:01,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2019-11-23 21:16:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:01,824 INFO L225 Difference]: With dead ends: 10937 [2019-11-23 21:16:01,825 INFO L226 Difference]: Without dead ends: 5469 [2019-11-23 21:16:01,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 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 21:16:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2019-11-23 21:16:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 5466. [2019-11-23 21:16:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5466 states. [2019-11-23 21:16:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 6352 transitions. [2019-11-23 21:16:01,926 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 6352 transitions. Word has length 466 [2019-11-23 21:16:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:01,927 INFO L462 AbstractCegarLoop]: Abstraction has 5466 states and 6352 transitions. [2019-11-23 21:16:01,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:16:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 6352 transitions. [2019-11-23 21:16:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2019-11-23 21:16:01,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:01,938 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, 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, 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] [2019-11-23 21:16:01,939 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1939420810, now seen corresponding path program 1 times [2019-11-23 21:16:01,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:01,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491950234] [2019-11-23 21:16:01,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-23 21:16:02,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491950234] [2019-11-23 21:16:02,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:02,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:16:02,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211713027] [2019-11-23 21:16:02,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:16:02,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:02,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:16:02,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:16:02,431 INFO L87 Difference]: Start difference. First operand 5466 states and 6352 transitions. Second operand 4 states. [2019-11-23 21:16:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:06,439 INFO L93 Difference]: Finished difference Result 17518 states and 20422 transitions. [2019-11-23 21:16:06,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:16:06,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2019-11-23 21:16:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:06,471 INFO L225 Difference]: With dead ends: 17518 [2019-11-23 21:16:06,471 INFO L226 Difference]: Without dead ends: 8466 [2019-11-23 21:16:06,481 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 21:16:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2019-11-23 21:16:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 7259. [2019-11-23 21:16:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2019-11-23 21:16:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 7879 transitions. [2019-11-23 21:16:06,594 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 7879 transitions. Word has length 489 [2019-11-23 21:16:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:06,595 INFO L462 AbstractCegarLoop]: Abstraction has 7259 states and 7879 transitions. [2019-11-23 21:16:06,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:16:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 7879 transitions. [2019-11-23 21:16:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2019-11-23 21:16:06,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:06,608 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:06,608 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1867065851, now seen corresponding path program 1 times [2019-11-23 21:16:06,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:06,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760390092] [2019-11-23 21:16:06,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-11-23 21:16:07,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760390092] [2019-11-23 21:16:07,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:07,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:16:07,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544850779] [2019-11-23 21:16:07,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:16:07,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:16:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:07,018 INFO L87 Difference]: Start difference. First operand 7259 states and 7879 transitions. Second operand 3 states. [2019-11-23 21:16:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:08,623 INFO L93 Difference]: Finished difference Result 14813 states and 16093 transitions. [2019-11-23 21:16:08,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:16:08,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 537 [2019-11-23 21:16:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:08,641 INFO L225 Difference]: With dead ends: 14813 [2019-11-23 21:16:08,642 INFO L226 Difference]: Without dead ends: 7556 [2019-11-23 21:16:08,649 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7556 states. [2019-11-23 21:16:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7556 to 7257. [2019-11-23 21:16:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7257 states. [2019-11-23 21:16:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7257 states to 7257 states and 7875 transitions. [2019-11-23 21:16:08,764 INFO L78 Accepts]: Start accepts. Automaton has 7257 states and 7875 transitions. Word has length 537 [2019-11-23 21:16:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:08,766 INFO L462 AbstractCegarLoop]: Abstraction has 7257 states and 7875 transitions. [2019-11-23 21:16:08,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:16:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7257 states and 7875 transitions. [2019-11-23 21:16:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2019-11-23 21:16:08,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:08,787 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:08,787 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:08,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1537002235, now seen corresponding path program 1 times [2019-11-23 21:16:08,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:08,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544316858] [2019-11-23 21:16:08,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:16:09,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544316858] [2019-11-23 21:16:09,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:09,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:16:09,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395396867] [2019-11-23 21:16:09,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:16:09,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:09,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:16:09,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:16:09,695 INFO L87 Difference]: Start difference. First operand 7257 states and 7875 transitions. Second operand 6 states. [2019-11-23 21:16:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:12,169 INFO L93 Difference]: Finished difference Result 14603 states and 15841 transitions. [2019-11-23 21:16:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:16:12,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 571 [2019-11-23 21:16:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:12,186 INFO L225 Difference]: With dead ends: 14603 [2019-11-23 21:16:12,186 INFO L226 Difference]: Without dead ends: 7348 [2019-11-23 21:16:12,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:16:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7348 states. [2019-11-23 21:16:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7348 to 7256. [2019-11-23 21:16:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7256 states. [2019-11-23 21:16:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 7806 transitions. [2019-11-23 21:16:12,284 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 7806 transitions. Word has length 571 [2019-11-23 21:16:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:12,285 INFO L462 AbstractCegarLoop]: Abstraction has 7256 states and 7806 transitions. [2019-11-23 21:16:12,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:16:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 7806 transitions. [2019-11-23 21:16:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2019-11-23 21:16:12,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:12,295 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:16:12,295 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:12,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:12,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1415090238, now seen corresponding path program 1 times [2019-11-23 21:16:12,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:12,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138373963] [2019-11-23 21:16:12,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 392 proven. 34 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:16:13,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138373963] [2019-11-23 21:16:13,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979412554] [2019-11-23 21:16:13,033 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 21:16:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:13,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 21:16:13,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:16:13,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:13,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-23 21:16:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2019-11-23 21:16:13,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:16:13,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-11-23 21:16:13,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257729302] [2019-11-23 21:16:13,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:16:13,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:16:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:16:13,838 INFO L87 Difference]: Start difference. First operand 7256 states and 7806 transitions. Second operand 4 states. [2019-11-23 21:16:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:21,301 INFO L93 Difference]: Finished difference Result 19024 states and 20620 transitions. [2019-11-23 21:16:21,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:16:21,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 632 [2019-11-23 21:16:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:21,323 INFO L225 Difference]: With dead ends: 19024 [2019-11-23 21:16:21,323 INFO L226 Difference]: Without dead ends: 11770 [2019-11-23 21:16:21,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:16:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11770 states. [2019-11-23 21:16:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11770 to 9051. [2019-11-23 21:16:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9051 states. [2019-11-23 21:16:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9051 states to 9051 states and 9789 transitions. [2019-11-23 21:16:21,453 INFO L78 Accepts]: Start accepts. Automaton has 9051 states and 9789 transitions. Word has length 632 [2019-11-23 21:16:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:21,454 INFO L462 AbstractCegarLoop]: Abstraction has 9051 states and 9789 transitions. [2019-11-23 21:16:21,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:16:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9051 states and 9789 transitions. [2019-11-23 21:16:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2019-11-23 21:16:21,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:21,466 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:16:21,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:16:21,670 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:21,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1686621216, now seen corresponding path program 1 times [2019-11-23 21:16:21,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:21,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849580164] [2019-11-23 21:16:21,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 419 proven. 34 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:16:22,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849580164] [2019-11-23 21:16:22,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691395435] [2019-11-23 21:16:22,334 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 21:16:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:22,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:16:22,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:16:22,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:22,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:23,029 WARN L192 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 23 [2019-11-23 21:16:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-11-23 21:16:23,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:16:23,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-23 21:16:23,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806607474] [2019-11-23 21:16:23,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:16:23,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:23,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:16:23,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:16:23,422 INFO L87 Difference]: Start difference. First operand 9051 states and 9789 transitions. Second operand 3 states. [2019-11-23 21:16:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:27,244 INFO L93 Difference]: Finished difference Result 24103 states and 26050 transitions. [2019-11-23 21:16:27,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:16:27,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 661 [2019-11-23 21:16:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:27,263 INFO L225 Difference]: With dead ends: 24103 [2019-11-23 21:16:27,264 INFO L226 Difference]: Without dead ends: 15054 [2019-11-23 21:16:27,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:16:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2019-11-23 21:16:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 12347. [2019-11-23 21:16:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12347 states. [2019-11-23 21:16:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12347 states to 12347 states and 13419 transitions. [2019-11-23 21:16:27,444 INFO L78 Accepts]: Start accepts. Automaton has 12347 states and 13419 transitions. Word has length 661 [2019-11-23 21:16:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:27,445 INFO L462 AbstractCegarLoop]: Abstraction has 12347 states and 13419 transitions. [2019-11-23 21:16:27,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:16:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 12347 states and 13419 transitions. [2019-11-23 21:16:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2019-11-23 21:16:27,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:27,463 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:16:27,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:16:27,668 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1561923461, now seen corresponding path program 1 times [2019-11-23 21:16:27,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:27,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229852015] [2019-11-23 21:16:27,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 21:16:28,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229852015] [2019-11-23 21:16:28,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:28,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:16:28,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364858015] [2019-11-23 21:16:28,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:16:28,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:16:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:28,173 INFO L87 Difference]: Start difference. First operand 12347 states and 13419 transitions. Second operand 3 states. [2019-11-23 21:16:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:30,039 INFO L93 Difference]: Finished difference Result 26784 states and 29160 transitions. [2019-11-23 21:16:30,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:16:30,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 666 [2019-11-23 21:16:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:30,054 INFO L225 Difference]: With dead ends: 26784 [2019-11-23 21:16:30,054 INFO L226 Difference]: Without dead ends: 14439 [2019-11-23 21:16:30,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14439 states. [2019-11-23 21:16:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14439 to 13841. [2019-11-23 21:16:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13841 states. [2019-11-23 21:16:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 14900 transitions. [2019-11-23 21:16:30,212 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 14900 transitions. Word has length 666 [2019-11-23 21:16:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:30,213 INFO L462 AbstractCegarLoop]: Abstraction has 13841 states and 14900 transitions. [2019-11-23 21:16:30,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:16:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 14900 transitions. [2019-11-23 21:16:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2019-11-23 21:16:30,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:30,233 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 21:16:30,234 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash -408992282, now seen corresponding path program 1 times [2019-11-23 21:16:30,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:30,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269120731] [2019-11-23 21:16:30,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 583 proven. 0 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2019-11-23 21:16:30,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269120731] [2019-11-23 21:16:30,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:30,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:16:30,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500576034] [2019-11-23 21:16:30,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:16:30,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:30,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:16:30,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:30,954 INFO L87 Difference]: Start difference. First operand 13841 states and 14900 transitions. Second operand 3 states. [2019-11-23 21:16:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:32,607 INFO L93 Difference]: Finished difference Result 30366 states and 32681 transitions. [2019-11-23 21:16:32,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:16:32,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 854 [2019-11-23 21:16:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:32,624 INFO L225 Difference]: With dead ends: 30366 [2019-11-23 21:16:32,624 INFO L226 Difference]: Without dead ends: 14733 [2019-11-23 21:16:32,633 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14733 states. [2019-11-23 21:16:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14733 to 14134. [2019-11-23 21:16:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14134 states. [2019-11-23 21:16:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14134 states to 14134 states and 14885 transitions. [2019-11-23 21:16:32,776 INFO L78 Accepts]: Start accepts. Automaton has 14134 states and 14885 transitions. Word has length 854 [2019-11-23 21:16:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:32,777 INFO L462 AbstractCegarLoop]: Abstraction has 14134 states and 14885 transitions. [2019-11-23 21:16:32,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:16:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14134 states and 14885 transitions. [2019-11-23 21:16:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 934 [2019-11-23 21:16:32,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:32,796 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, 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, 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, 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] [2019-11-23 21:16:32,797 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash -497974071, now seen corresponding path program 1 times [2019-11-23 21:16:32,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:32,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642311182] [2019-11-23 21:16:32,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 1217 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2019-11-23 21:16:33,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642311182] [2019-11-23 21:16:33,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:33,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:16:33,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614000751] [2019-11-23 21:16:33,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:16:33,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:33,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:16:33,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:33,528 INFO L87 Difference]: Start difference. First operand 14134 states and 14885 transitions. Second operand 3 states. [2019-11-23 21:16:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:35,095 INFO L93 Difference]: Finished difference Result 31866 states and 33594 transitions. [2019-11-23 21:16:35,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:16:35,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 933 [2019-11-23 21:16:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:35,113 INFO L225 Difference]: With dead ends: 31866 [2019-11-23 21:16:35,114 INFO L226 Difference]: Without dead ends: 17734 [2019-11-23 21:16:35,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:16:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17734 states. [2019-11-23 21:16:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17734 to 16528. [2019-11-23 21:16:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16528 states. [2019-11-23 21:16:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16528 states to 16528 states and 17374 transitions. [2019-11-23 21:16:35,284 INFO L78 Accepts]: Start accepts. Automaton has 16528 states and 17374 transitions. Word has length 933 [2019-11-23 21:16:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:35,285 INFO L462 AbstractCegarLoop]: Abstraction has 16528 states and 17374 transitions. [2019-11-23 21:16:35,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:16:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 16528 states and 17374 transitions. [2019-11-23 21:16:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2019-11-23 21:16:35,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:35,305 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:16:35,305 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash -605370242, now seen corresponding path program 1 times [2019-11-23 21:16:35,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:35,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469924627] [2019-11-23 21:16:35,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 507 proven. 1143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:16:38,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469924627] [2019-11-23 21:16:38,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576711018] [2019-11-23 21:16:38,377 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 21:16:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:38,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 21:16:38,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:16:38,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:38,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:38,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:16:38,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:16:38,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:16:38,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:38,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:39,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-23 21:16:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 1076 proven. 386 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-23 21:16:42,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:16:42,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 23 [2019-11-23 21:16:42,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194242315] [2019-11-23 21:16:42,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 21:16:42,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 21:16:42,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2019-11-23 21:16:42,092 INFO L87 Difference]: Start difference. First operand 16528 states and 17374 transitions. Second operand 23 states.