/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:24:09,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:24:09,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:24:09,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:24:09,675 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 21:24:09,690 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:24:09,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:24:09,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:24:09,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:24:09,695 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:24:09,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:24:09,695 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:24:09,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:24:09,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:24:09,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:24:09,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:24:09,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:24:09,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:24:09,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:24:09,697 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:24:09,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:24:09,697 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:24:09,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:24:09,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:24:09,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:24:09,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:24:09,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:24:09,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:24:09,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:24:09,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:24:09,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:24:09,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:24:09,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:24:09,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:24:09,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:24:10,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:24:10,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:24:10,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:24:10,065 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:24:10,066 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:24:10,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label41.c [2019-11-23 21:24:10,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4cf7031/3597f5268805494d89fcf33231ca5a6b/FLAGdb8960020 [2019-11-23 21:24:10,943 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:24:10,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label41.c [2019-11-23 21:24:10,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4cf7031/3597f5268805494d89fcf33231ca5a6b/FLAGdb8960020 [2019-11-23 21:24:10,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4cf7031/3597f5268805494d89fcf33231ca5a6b [2019-11-23 21:24:11,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:24:11,007 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:24:11,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:11,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:24:11,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:24:11,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:10" (1/1) ... [2019-11-23 21:24:11,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358d336d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:11, skipping insertion in model container [2019-11-23 21:24:11,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:10" (1/1) ... [2019-11-23 21:24:11,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:24:11,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:24:12,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:12,446 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:24:12,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:12,996 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:24:12,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12 WrapperNode [2019-11-23 21:24:12,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:12,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:12,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:24:12,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:24:13,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:13,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:24:13,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:24:13,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:24:13,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (1/1) ... [2019-11-23 21:24:13,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:24:13,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:24:13,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:24:13,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:24:13,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (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 21:24:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:24:13,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:24:17,406 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:24:17,406 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:24:17,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:17 BoogieIcfgContainer [2019-11-23 21:24:17,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:24:17,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:24:17,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:24:17,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:24:17,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:10" (1/3) ... [2019-11-23 21:24:17,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5534ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:17, skipping insertion in model container [2019-11-23 21:24:17,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12" (2/3) ... [2019-11-23 21:24:17,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5534ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:17, skipping insertion in model container [2019-11-23 21:24:17,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:17" (3/3) ... [2019-11-23 21:24:17,417 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label41.c [2019-11-23 21:24:17,428 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:24:17,437 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:24:17,449 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:24:17,488 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:24:17,489 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:24:17,489 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:24:17,489 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:24:17,489 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:24:17,490 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:24:17,490 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:24:17,490 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:24:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:24:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 21:24:17,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:17,539 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:17,540 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2019-11-23 21:24:17,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:17,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825878184] [2019-11-23 21:24:17,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:17,954 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 21:24:17,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825878184] [2019-11-23 21:24:17,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:17,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 21:24:17,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359789601] [2019-11-23 21:24:17,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:24:17,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:24:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:17,985 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 6 states. [2019-11-23 21:24:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:26,527 INFO L93 Difference]: Finished difference Result 2900 states and 5648 transitions. [2019-11-23 21:24:26,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:24:26,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2019-11-23 21:24:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:26,562 INFO L225 Difference]: With dead ends: 2900 [2019-11-23 21:24:26,562 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:24:26,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:24:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:24:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:24:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:24:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3226 transitions. [2019-11-23 21:24:26,714 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3226 transitions. Word has length 65 [2019-11-23 21:24:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:26,715 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3226 transitions. [2019-11-23 21:24:26,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:24:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3226 transitions. [2019-11-23 21:24:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-11-23 21:24:26,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:26,723 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:26,724 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:26,724 INFO L82 PathProgramCache]: Analyzing trace with hash -173553005, now seen corresponding path program 1 times [2019-11-23 21:24:26,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:26,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858791938] [2019-11-23 21:24:26,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 21:24:27,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858791938] [2019-11-23 21:24:27,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:27,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:27,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284505995] [2019-11-23 21:24:27,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:24:27,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:27,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:24:27,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:24:27,217 INFO L87 Difference]: Start difference. First operand 2074 states and 3226 transitions. Second operand 5 states. [2019-11-23 21:24:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:33,559 INFO L93 Difference]: Finished difference Result 6216 states and 9564 transitions. [2019-11-23 21:24:33,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:33,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 242 [2019-11-23 21:24:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:33,581 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:24:33,582 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:24:33,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:24:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:24:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:24:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5440 transitions. [2019-11-23 21:24:33,663 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5440 transitions. Word has length 242 [2019-11-23 21:24:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:33,663 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5440 transitions. [2019-11-23 21:24:33,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:24:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5440 transitions. [2019-11-23 21:24:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-11-23 21:24:33,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:33,668 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:33,668 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:33,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:33,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1753449132, now seen corresponding path program 1 times [2019-11-23 21:24:33,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:33,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168275317] [2019-11-23 21:24:33,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 193 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 21:24:34,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168275317] [2019-11-23 21:24:34,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883229961] [2019-11-23 21:24:34,392 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 21:24:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:34,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:34,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-23 21:24:34,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:34,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2019-11-23 21:24:34,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428639916] [2019-11-23 21:24:34,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:34,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:34,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:34,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:34,725 INFO L87 Difference]: Start difference. First operand 4144 states and 5440 transitions. Second operand 3 states. [2019-11-23 21:24:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:38,397 INFO L93 Difference]: Finished difference Result 9666 states and 13519 transitions. [2019-11-23 21:24:38,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:38,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2019-11-23 21:24:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:38,425 INFO L225 Difference]: With dead ends: 9666 [2019-11-23 21:24:38,425 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:24:38,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:24:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:24:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:24:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 7769 transitions. [2019-11-23 21:24:38,533 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 7769 transitions. Word has length 331 [2019-11-23 21:24:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:38,534 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 7769 transitions. [2019-11-23 21:24:38,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 7769 transitions. [2019-11-23 21:24:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-11-23 21:24:38,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:38,543 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2019-11-23 21:24:38,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:38,757 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:38,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1601624826, now seen corresponding path program 1 times [2019-11-23 21:24:38,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:38,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547024310] [2019-11-23 21:24:38,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 275 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 21:24:39,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547024310] [2019-11-23 21:24:39,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037245089] [2019-11-23 21:24:39,123 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 21:24:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:39,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:39,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 21:24:39,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:39,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:24:39,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612708041] [2019-11-23 21:24:39,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:39,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:39,425 INFO L87 Difference]: Start difference. First operand 6214 states and 7769 transitions. Second operand 3 states. [2019-11-23 21:24:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:43,053 INFO L93 Difference]: Finished difference Result 15876 states and 20506 transitions. [2019-11-23 21:24:43,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:43,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 398 [2019-11-23 21:24:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:43,095 INFO L225 Difference]: With dead ends: 15876 [2019-11-23 21:24:43,095 INFO L226 Difference]: Without dead ends: 10354 [2019-11-23 21:24:43,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 398 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 21:24:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10354 states. [2019-11-23 21:24:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10354 to 9664. [2019-11-23 21:24:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9664 states. [2019-11-23 21:24:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9664 states to 9664 states and 11695 transitions. [2019-11-23 21:24:43,282 INFO L78 Accepts]: Start accepts. Automaton has 9664 states and 11695 transitions. Word has length 398 [2019-11-23 21:24:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:43,283 INFO L462 AbstractCegarLoop]: Abstraction has 9664 states and 11695 transitions. [2019-11-23 21:24:43,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 9664 states and 11695 transitions. [2019-11-23 21:24:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2019-11-23 21:24:43,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:43,299 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 21:24:43,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:43,504 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash 194047450, now seen corresponding path program 1 times [2019-11-23 21:24:43,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:43,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881612675] [2019-11-23 21:24:43,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 405 proven. 3 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-23 21:24:44,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881612675] [2019-11-23 21:24:44,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811376161] [2019-11-23 21:24:44,309 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 21:24:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:44,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:44,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:24:44,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:44,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:44,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223992928] [2019-11-23 21:24:44,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:44,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:44,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:44,774 INFO L87 Difference]: Start difference. First operand 9664 states and 11695 transitions. Second operand 3 states. [2019-11-23 21:24:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:48,412 INFO L93 Difference]: Finished difference Result 22776 states and 28514 transitions. [2019-11-23 21:24:48,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:48,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2019-11-23 21:24:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:48,454 INFO L225 Difference]: With dead ends: 22776 [2019-11-23 21:24:48,454 INFO L226 Difference]: Without dead ends: 13804 [2019-11-23 21:24:48,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 492 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2019-11-23 21:24:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13804. [2019-11-23 21:24:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13804 states. [2019-11-23 21:24:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 16995 transitions. [2019-11-23 21:24:48,647 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 16995 transitions. Word has length 493 [2019-11-23 21:24:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:48,648 INFO L462 AbstractCegarLoop]: Abstraction has 13804 states and 16995 transitions. [2019-11-23 21:24:48,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 16995 transitions. [2019-11-23 21:24:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2019-11-23 21:24:48,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:48,658 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 21:24:48,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:48,928 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1198185025, now seen corresponding path program 1 times [2019-11-23 21:24:48,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:48,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107202269] [2019-11-23 21:24:48,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 408 proven. 3 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-23 21:24:49,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107202269] [2019-11-23 21:24:49,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743026865] [2019-11-23 21:24:49,739 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 21:24:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:49,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:49,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-11-23 21:24:50,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:50,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:50,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470321468] [2019-11-23 21:24:50,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:50,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:50,255 INFO L87 Difference]: Start difference. First operand 13804 states and 16995 transitions. Second operand 3 states. [2019-11-23 21:24:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:54,008 INFO L93 Difference]: Finished difference Result 33816 states and 42848 transitions. [2019-11-23 21:24:54,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:54,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2019-11-23 21:24:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:54,050 INFO L225 Difference]: With dead ends: 33816 [2019-11-23 21:24:54,051 INFO L226 Difference]: Without dead ends: 20704 [2019-11-23 21:24:54,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 495 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2019-11-23 21:24:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 18634. [2019-11-23 21:24:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18634 states. [2019-11-23 21:24:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 22784 transitions. [2019-11-23 21:24:54,304 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 22784 transitions. Word has length 496 [2019-11-23 21:24:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:54,305 INFO L462 AbstractCegarLoop]: Abstraction has 18634 states and 22784 transitions. [2019-11-23 21:24:54,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 22784 transitions. [2019-11-23 21:24:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2019-11-23 21:24:54,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:54,319 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:54,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:54,522 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -236109817, now seen corresponding path program 1 times [2019-11-23 21:24:54,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:54,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273656969] [2019-11-23 21:24:54,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 480 proven. 3 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-11-23 21:24:55,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273656969] [2019-11-23 21:24:55,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962549894] [2019-11-23 21:24:55,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:55,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:55,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 21:24:55,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:55,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:55,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142590161] [2019-11-23 21:24:55,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:55,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:55,550 INFO L87 Difference]: Start difference. First operand 18634 states and 22784 transitions. Second operand 3 states. [2019-11-23 21:24:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:59,707 INFO L93 Difference]: Finished difference Result 44166 states and 54266 transitions. [2019-11-23 21:24:59,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:59,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 518 [2019-11-23 21:24:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:59,734 INFO L225 Difference]: With dead ends: 44166 [2019-11-23 21:24:59,735 INFO L226 Difference]: Without dead ends: 23464 [2019-11-23 21:24:59,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 517 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23464 states. [2019-11-23 21:24:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23464 to 23464. [2019-11-23 21:24:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23464 states. [2019-11-23 21:24:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 25469 transitions. [2019-11-23 21:24:59,985 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 25469 transitions. Word has length 518 [2019-11-23 21:24:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:59,986 INFO L462 AbstractCegarLoop]: Abstraction has 23464 states and 25469 transitions. [2019-11-23 21:24:59,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 25469 transitions. [2019-11-23 21:25:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1200 [2019-11-23 21:25:00,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:00,013 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:00,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:00,217 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash 477877571, now seen corresponding path program 1 times [2019-11-23 21:25:00,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:00,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73501651] [2019-11-23 21:25:00,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 899 proven. 0 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-23 21:25:01,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73501651] [2019-11-23 21:25:01,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:01,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:01,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292994668] [2019-11-23 21:25:01,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:01,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:01,910 INFO L87 Difference]: Start difference. First operand 23464 states and 25469 transitions. Second operand 4 states. [2019-11-23 21:25:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:06,664 INFO L93 Difference]: Finished difference Result 64866 states and 71448 transitions. [2019-11-23 21:25:06,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:06,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1199 [2019-11-23 21:25:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:06,707 INFO L225 Difference]: With dead ends: 64866 [2019-11-23 21:25:06,707 INFO L226 Difference]: Without dead ends: 42094 [2019-11-23 21:25:06,729 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 21:25:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2019-11-23 21:25:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 42094. [2019-11-23 21:25:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42094 states. [2019-11-23 21:25:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 45656 transitions. [2019-11-23 21:25:07,205 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 45656 transitions. Word has length 1199 [2019-11-23 21:25:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:07,206 INFO L462 AbstractCegarLoop]: Abstraction has 42094 states and 45656 transitions. [2019-11-23 21:25:07,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 45656 transitions. [2019-11-23 21:25:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2019-11-23 21:25:07,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:07,234 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:07,234 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash -707972506, now seen corresponding path program 1 times [2019-11-23 21:25:07,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:07,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103873197] [2019-11-23 21:25:07,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2019-11-23 21:25:09,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103873197] [2019-11-23 21:25:09,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:09,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:09,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252207152] [2019-11-23 21:25:09,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:09,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:09,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:25:09,293 INFO L87 Difference]: Start difference. First operand 42094 states and 45656 transitions. Second operand 3 states. [2019-11-23 21:25:11,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:11,657 INFO L93 Difference]: Finished difference Result 83496 states and 90619 transitions. [2019-11-23 21:25:11,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:11,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1213 [2019-11-23 21:25:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:11,703 INFO L225 Difference]: With dead ends: 83496 [2019-11-23 21:25:11,703 INFO L226 Difference]: Without dead ends: 42094 [2019-11-23 21:25:11,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 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 21:25:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2019-11-23 21:25:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 42094. [2019-11-23 21:25:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42094 states. [2019-11-23 21:25:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 45112 transitions. [2019-11-23 21:25:12,137 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 45112 transitions. Word has length 1213 [2019-11-23 21:25:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:12,138 INFO L462 AbstractCegarLoop]: Abstraction has 42094 states and 45112 transitions. [2019-11-23 21:25:12,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 45112 transitions. [2019-11-23 21:25:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1250 [2019-11-23 21:25:12,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:12,169 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:12,169 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 10398545, now seen corresponding path program 1 times [2019-11-23 21:25:12,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:12,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539707088] [2019-11-23 21:25:12,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1866 backedges. 779 proven. 0 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2019-11-23 21:25:14,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539707088] [2019-11-23 21:25:14,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:14,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:14,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336376434] [2019-11-23 21:25:14,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:14,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:14,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:14,572 INFO L87 Difference]: Start difference. First operand 42094 states and 45112 transitions. Second operand 4 states. [2019-11-23 21:25:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:18,937 INFO L93 Difference]: Finished difference Result 92466 states and 99355 transitions. [2019-11-23 21:25:18,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:18,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1249 [2019-11-23 21:25:18,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:18,979 INFO L225 Difference]: With dead ends: 92466 [2019-11-23 21:25:18,979 INFO L226 Difference]: Without dead ends: 49684 [2019-11-23 21:25:18,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 21:25:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2019-11-23 21:25:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 47614. [2019-11-23 21:25:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47614 states. [2019-11-23 21:25:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47614 states to 47614 states and 50103 transitions. [2019-11-23 21:25:19,371 INFO L78 Accepts]: Start accepts. Automaton has 47614 states and 50103 transitions. Word has length 1249 [2019-11-23 21:25:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:19,372 INFO L462 AbstractCegarLoop]: Abstraction has 47614 states and 50103 transitions. [2019-11-23 21:25:19,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 47614 states and 50103 transitions. [2019-11-23 21:25:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1399 [2019-11-23 21:25:19,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:19,402 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:19,402 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:19,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:19,403 INFO L82 PathProgramCache]: Analyzing trace with hash 57704645, now seen corresponding path program 1 times [2019-11-23 21:25:19,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:19,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139054562] [2019-11-23 21:25:19,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 1708 proven. 0 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2019-11-23 21:25:20,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139054562] [2019-11-23 21:25:20,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:20,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:20,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425217685] [2019-11-23 21:25:20,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:20,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:20,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:20,739 INFO L87 Difference]: Start difference. First operand 47614 states and 50103 transitions. Second operand 4 states. [2019-11-23 21:25:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:25,860 INFO L93 Difference]: Finished difference Result 105576 states and 111304 transitions. [2019-11-23 21:25:25,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:25,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1398 [2019-11-23 21:25:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:25,917 INFO L225 Difference]: With dead ends: 105576 [2019-11-23 21:25:25,917 INFO L226 Difference]: Without dead ends: 57964 [2019-11-23 21:25:25,941 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 21:25:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57964 states. [2019-11-23 21:25:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57964 to 55204. [2019-11-23 21:25:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55204 states. [2019-11-23 21:25:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55204 states to 55204 states and 57610 transitions. [2019-11-23 21:25:26,351 INFO L78 Accepts]: Start accepts. Automaton has 55204 states and 57610 transitions. Word has length 1398 [2019-11-23 21:25:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:26,352 INFO L462 AbstractCegarLoop]: Abstraction has 55204 states and 57610 transitions. [2019-11-23 21:25:26,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 55204 states and 57610 transitions. [2019-11-23 21:25:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1531 [2019-11-23 21:25:26,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:26,387 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:26,388 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1734786822, now seen corresponding path program 1 times [2019-11-23 21:25:26,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:26,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521136458] [2019-11-23 21:25:26,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat