/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/Problem16_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:19:21,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:19:21,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:19:21,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:19:21,842 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 21:19:21,862 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:19:21,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:19:21,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:19:21,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:19:21,867 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:19:21,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:19:21,867 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:19:21,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:19:21,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:19:21,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:19:21,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:19:21,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:19:21,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:19:21,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:19:21,870 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:19:21,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:19:21,871 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:19:21,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:19:21,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:19:21,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:19:21,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:19:21,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:19:21,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:19:21,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:19:21,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:19:21,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:19:21,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:19:21,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:19:21,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:19:21,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:19:22,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:19:22,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:19:22,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:19:22,232 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:19:22,232 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:19:22,233 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-11-23 21:19:22,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3346b5e0c/213fc13e431045099fea61038b35c099/FLAGc2b4574f6 [2019-11-23 21:19:22,942 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:19:22,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-11-23 21:19:22,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3346b5e0c/213fc13e431045099fea61038b35c099/FLAGc2b4574f6 [2019-11-23 21:19:23,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3346b5e0c/213fc13e431045099fea61038b35c099 [2019-11-23 21:19:23,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:19:23,179 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:19:23,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:23,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:19:23,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:19:23,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:23" (1/1) ... [2019-11-23 21:19:23,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587d38cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23, skipping insertion in model container [2019-11-23 21:19:23,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:23" (1/1) ... [2019-11-23 21:19:23,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:19:23,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:19:24,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:24,137 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:19:24,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:24,553 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:19:24,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24 WrapperNode [2019-11-23 21:19:24,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:24,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:24,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:19:24,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:19:24,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:24,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:19:24,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:19:24,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:19:24,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:24,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (1/1) ... [2019-11-23 21:19:25,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:19:25,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:19:25,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:19:25,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:19:25,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (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 21:19:25,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:19:25,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:19:27,383 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:19:27,383 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:19:27,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:27 BoogieIcfgContainer [2019-11-23 21:19:27,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:19:27,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:19:27,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:19:27,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:19:27,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:23" (1/3) ... [2019-11-23 21:19:27,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b17c8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:27, skipping insertion in model container [2019-11-23 21:19:27,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:24" (2/3) ... [2019-11-23 21:19:27,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b17c8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:27, skipping insertion in model container [2019-11-23 21:19:27,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:27" (3/3) ... [2019-11-23 21:19:27,395 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2019-11-23 21:19:27,405 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:19:27,413 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:19:27,425 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:19:27,476 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:19:27,476 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:19:27,476 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:19:27,476 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:19:27,476 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:19:27,477 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:19:27,478 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:19:27,478 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:19:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2019-11-23 21:19:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 21:19:27,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:27,522 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] [2019-11-23 21:19:27,522 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1089129850, now seen corresponding path program 1 times [2019-11-23 21:19:27,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:27,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016492820] [2019-11-23 21:19:27,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:27,982 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 21:19:27,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016492820] [2019-11-23 21:19:27,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:27,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:19:27,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977352279] [2019-11-23 21:19:27,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:19:27,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:19:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:19:28,008 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 7 states. [2019-11-23 21:19:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:34,073 INFO L93 Difference]: Finished difference Result 1815 states and 3471 transitions. [2019-11-23 21:19:34,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:19:34,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-23 21:19:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:34,101 INFO L225 Difference]: With dead ends: 1815 [2019-11-23 21:19:34,101 INFO L226 Difference]: Without dead ends: 1342 [2019-11-23 21:19:34,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:19:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2019-11-23 21:19:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 991. [2019-11-23 21:19:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-11-23 21:19:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1483 transitions. [2019-11-23 21:19:34,213 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1483 transitions. Word has length 34 [2019-11-23 21:19:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:34,214 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1483 transitions. [2019-11-23 21:19:34,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:19:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1483 transitions. [2019-11-23 21:19:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-23 21:19:34,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:34,226 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:19:34,226 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1667610510, now seen corresponding path program 1 times [2019-11-23 21:19:34,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:34,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169249720] [2019-11-23 21:19:34,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 21:19:34,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169249720] [2019-11-23 21:19:34,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:34,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:19:34,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505903090] [2019-11-23 21:19:34,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:34,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:34,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:34,619 INFO L87 Difference]: Start difference. First operand 991 states and 1483 transitions. Second operand 4 states. [2019-11-23 21:19:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:36,793 INFO L93 Difference]: Finished difference Result 2638 states and 4103 transitions. [2019-11-23 21:19:36,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:36,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 224 [2019-11-23 21:19:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:36,806 INFO L225 Difference]: With dead ends: 2638 [2019-11-23 21:19:36,806 INFO L226 Difference]: Without dead ends: 1649 [2019-11-23 21:19:36,813 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 21:19:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2019-11-23 21:19:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2019-11-23 21:19:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2019-11-23 21:19:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2382 transitions. [2019-11-23 21:19:36,904 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2382 transitions. Word has length 224 [2019-11-23 21:19:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:36,909 INFO L462 AbstractCegarLoop]: Abstraction has 1649 states and 2382 transitions. [2019-11-23 21:19:36,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2382 transitions. [2019-11-23 21:19:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-11-23 21:19:36,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:36,989 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:36,989 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash -518694083, now seen corresponding path program 1 times [2019-11-23 21:19:36,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:36,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055075805] [2019-11-23 21:19:36,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 21:19:37,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055075805] [2019-11-23 21:19:37,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:37,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:37,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704073704] [2019-11-23 21:19:37,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:37,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:37,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:37,364 INFO L87 Difference]: Start difference. First operand 1649 states and 2382 transitions. Second operand 4 states. [2019-11-23 21:19:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:40,064 INFO L93 Difference]: Finished difference Result 4612 states and 6546 transitions. [2019-11-23 21:19:40,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:40,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2019-11-23 21:19:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:40,078 INFO L225 Difference]: With dead ends: 4612 [2019-11-23 21:19:40,079 INFO L226 Difference]: Without dead ends: 2636 [2019-11-23 21:19:40,082 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 21:19:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2019-11-23 21:19:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2019-11-23 21:19:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-11-23 21:19:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 2855 transitions. [2019-11-23 21:19:40,133 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 2855 transitions. Word has length 335 [2019-11-23 21:19:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:40,133 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 2855 transitions. [2019-11-23 21:19:40,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 2855 transitions. [2019-11-23 21:19:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2019-11-23 21:19:40,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:40,149 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:40,149 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash 689959157, now seen corresponding path program 1 times [2019-11-23 21:19:40,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:40,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76103209] [2019-11-23 21:19:40,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 633 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 21:19:40,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76103209] [2019-11-23 21:19:40,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:40,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:40,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606999147] [2019-11-23 21:19:40,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:40,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:40,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:40,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:40,949 INFO L87 Difference]: Start difference. First operand 2636 states and 2855 transitions. Second operand 4 states. [2019-11-23 21:19:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:43,040 INFO L93 Difference]: Finished difference Result 8231 states and 8981 transitions. [2019-11-23 21:19:43,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:43,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 611 [2019-11-23 21:19:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:43,068 INFO L225 Difference]: With dead ends: 8231 [2019-11-23 21:19:43,069 INFO L226 Difference]: Without dead ends: 5926 [2019-11-23 21:19:43,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 21:19:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2019-11-23 21:19:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 4939. [2019-11-23 21:19:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4939 states. [2019-11-23 21:19:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5298 transitions. [2019-11-23 21:19:43,184 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5298 transitions. Word has length 611 [2019-11-23 21:19:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:43,185 INFO L462 AbstractCegarLoop]: Abstraction has 4939 states and 5298 transitions. [2019-11-23 21:19:43,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5298 transitions. [2019-11-23 21:19:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2019-11-23 21:19:43,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:43,217 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:43,218 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1143515111, now seen corresponding path program 1 times [2019-11-23 21:19:43,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:43,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364352319] [2019-11-23 21:19:43,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 711 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-11-23 21:19:43,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364352319] [2019-11-23 21:19:43,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:43,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:43,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013881310] [2019-11-23 21:19:43,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:43,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:43,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:44,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:44,000 INFO L87 Difference]: Start difference. First operand 4939 states and 5298 transitions. Second operand 4 states. [2019-11-23 21:19:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:46,409 INFO L93 Difference]: Finished difference Result 12837 states and 13876 transitions. [2019-11-23 21:19:46,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:46,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 674 [2019-11-23 21:19:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:46,444 INFO L225 Difference]: With dead ends: 12837 [2019-11-23 21:19:46,444 INFO L226 Difference]: Without dead ends: 8229 [2019-11-23 21:19:46,450 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 21:19:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2019-11-23 21:19:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 7900. [2019-11-23 21:19:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2019-11-23 21:19:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8415 transitions. [2019-11-23 21:19:46,591 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8415 transitions. Word has length 674 [2019-11-23 21:19:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:46,592 INFO L462 AbstractCegarLoop]: Abstraction has 7900 states and 8415 transitions. [2019-11-23 21:19:46,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8415 transitions. [2019-11-23 21:19:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2019-11-23 21:19:46,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:46,617 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:46,617 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 4798865, now seen corresponding path program 1 times [2019-11-23 21:19:46,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:46,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651201934] [2019-11-23 21:19:46,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 823 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2019-11-23 21:19:48,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651201934] [2019-11-23 21:19:48,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:48,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:48,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663623887] [2019-11-23 21:19:48,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:48,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:48,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:48,099 INFO L87 Difference]: Start difference. First operand 7900 states and 8415 transitions. Second operand 4 states. [2019-11-23 21:19:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:50,023 INFO L93 Difference]: Finished difference Result 15798 states and 16838 transitions. [2019-11-23 21:19:50,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:50,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 947 [2019-11-23 21:19:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:50,067 INFO L225 Difference]: With dead ends: 15798 [2019-11-23 21:19:50,067 INFO L226 Difference]: Without dead ends: 8229 [2019-11-23 21:19:50,080 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 21:19:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2019-11-23 21:19:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2019-11-23 21:19:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2019-11-23 21:19:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8612 transitions. [2019-11-23 21:19:50,230 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8612 transitions. Word has length 947 [2019-11-23 21:19:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:50,231 INFO L462 AbstractCegarLoop]: Abstraction has 8229 states and 8612 transitions. [2019-11-23 21:19:50,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8612 transitions. [2019-11-23 21:19:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1231 [2019-11-23 21:19:50,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:50,266 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 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] [2019-11-23 21:19:50,266 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash -183645654, now seen corresponding path program 1 times [2019-11-23 21:19:50,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:50,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450190062] [2019-11-23 21:19:50,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 1731 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2019-11-23 21:19:53,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450190062] [2019-11-23 21:19:53,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:53,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:19:53,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839189449] [2019-11-23 21:19:53,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:19:53,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:19:53,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:19:53,476 INFO L87 Difference]: Start difference. First operand 8229 states and 8612 transitions. Second operand 6 states. [2019-11-23 21:19:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:56,223 INFO L93 Difference]: Finished difference Result 16794 states and 17574 transitions. [2019-11-23 21:19:56,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:19:56,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1230 [2019-11-23 21:19:56,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:56,247 INFO L225 Difference]: With dead ends: 16794 [2019-11-23 21:19:56,247 INFO L226 Difference]: Without dead ends: 8896 [2019-11-23 21:19:56,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:19:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2019-11-23 21:19:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8558. [2019-11-23 21:19:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8558 states. [2019-11-23 21:19:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 8947 transitions. [2019-11-23 21:19:56,363 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 8947 transitions. Word has length 1230 [2019-11-23 21:19:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:56,365 INFO L462 AbstractCegarLoop]: Abstraction has 8558 states and 8947 transitions. [2019-11-23 21:19:56,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:19:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 8947 transitions. [2019-11-23 21:19:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1356 [2019-11-23 21:19:56,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:56,391 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:56,392 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash 858287929, now seen corresponding path program 1 times [2019-11-23 21:19:56,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:56,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032522677] [2019-11-23 21:19:56,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3712 backedges. 2321 proven. 0 refuted. 0 times theorem prover too weak. 1391 trivial. 0 not checked. [2019-11-23 21:19:57,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032522677] [2019-11-23 21:19:57,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:57,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:57,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423095193] [2019-11-23 21:19:57,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:57,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:57,919 INFO L87 Difference]: Start difference. First operand 8558 states and 8947 transitions. Second operand 4 states. [2019-11-23 21:19:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:59,943 INFO L93 Difference]: Finished difference Result 21062 states and 22023 transitions. [2019-11-23 21:19:59,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:59,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1355 [2019-11-23 21:19:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:59,966 INFO L225 Difference]: With dead ends: 21062 [2019-11-23 21:19:59,966 INFO L226 Difference]: Without dead ends: 12835 [2019-11-23 21:19:59,975 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 21:19:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2019-11-23 21:20:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12506. [2019-11-23 21:20:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12506 states. [2019-11-23 21:20:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12970 transitions. [2019-11-23 21:20:00,117 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12970 transitions. Word has length 1355 [2019-11-23 21:20:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:00,118 INFO L462 AbstractCegarLoop]: Abstraction has 12506 states and 12970 transitions. [2019-11-23 21:20:00,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12970 transitions. [2019-11-23 21:20:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1436 [2019-11-23 21:20:00,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:00,151 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:00,151 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1852286707, now seen corresponding path program 1 times [2019-11-23 21:20:00,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:00,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221169581] [2019-11-23 21:20:00,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3902 backedges. 2057 proven. 0 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2019-11-23 21:20:01,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221169581] [2019-11-23 21:20:01,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:01,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:01,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185496812] [2019-11-23 21:20:01,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:01,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:01,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:01,632 INFO L87 Difference]: Start difference. First operand 12506 states and 12970 transitions. Second operand 4 states. [2019-11-23 21:20:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:03,523 INFO L93 Difference]: Finished difference Result 27313 states and 28282 transitions. [2019-11-23 21:20:03,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:03,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1435 [2019-11-23 21:20:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:03,546 INFO L225 Difference]: With dead ends: 27313 [2019-11-23 21:20:03,547 INFO L226 Difference]: Without dead ends: 13493 [2019-11-23 21:20:03,559 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:20:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2019-11-23 21:20:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 11848. [2019-11-23 21:20:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11848 states. [2019-11-23 21:20:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12153 transitions. [2019-11-23 21:20:03,702 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12153 transitions. Word has length 1435 [2019-11-23 21:20:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:03,703 INFO L462 AbstractCegarLoop]: Abstraction has 11848 states and 12153 transitions. [2019-11-23 21:20:03,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12153 transitions. [2019-11-23 21:20:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1511 [2019-11-23 21:20:03,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:03,751 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:03,752 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2029366214, now seen corresponding path program 1 times [2019-11-23 21:20:03,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:03,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277124470] [2019-11-23 21:20:03,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4210 backedges. 2133 proven. 520 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2019-11-23 21:20:06,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277124470] [2019-11-23 21:20:06,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326931078] [2019-11-23 21:20:06,340 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 21:20:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:06,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:20:06,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4210 backedges. 2436 proven. 0 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2019-11-23 21:20:08,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:08,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-23 21:20:08,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404730715] [2019-11-23 21:20:08,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:08,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:08,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:08,044 INFO L87 Difference]: Start difference. First operand 11848 states and 12153 transitions. Second operand 3 states. [2019-11-23 21:20:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:09,299 INFO L93 Difference]: Finished difference Result 23365 states and 23973 transitions. [2019-11-23 21:20:09,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:09,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1510 [2019-11-23 21:20:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:09,332 INFO L225 Difference]: With dead ends: 23365 [2019-11-23 21:20:09,332 INFO L226 Difference]: Without dead ends: 11848 [2019-11-23 21:20:09,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1519 GetRequests, 1510 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2019-11-23 21:20:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11848. [2019-11-23 21:20:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11848 states. [2019-11-23 21:20:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12136 transitions. [2019-11-23 21:20:09,564 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12136 transitions. Word has length 1510 [2019-11-23 21:20:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:09,566 INFO L462 AbstractCegarLoop]: Abstraction has 11848 states and 12136 transitions. [2019-11-23 21:20:09,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12136 transitions. [2019-11-23 21:20:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1841 [2019-11-23 21:20:09,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:09,636 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:09,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:09,842 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1217713126, now seen corresponding path program 1 times [2019-11-23 21:20:09,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:09,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372761976] [2019-11-23 21:20:09,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6649 backedges. 1607 proven. 0 refuted. 0 times theorem prover too weak. 5042 trivial. 0 not checked. [2019-11-23 21:20:12,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372761976] [2019-11-23 21:20:12,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:12,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:20:12,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620010247] [2019-11-23 21:20:12,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:12,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:12,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:12,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:20:12,214 INFO L87 Difference]: Start difference. First operand 11848 states and 12136 transitions. Second operand 3 states. [2019-11-23 21:20:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:13,422 INFO L93 Difference]: Finished difference Result 25997 states and 26662 transitions. [2019-11-23 21:20:13,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:13,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1840 [2019-11-23 21:20:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:13,448 INFO L225 Difference]: With dead ends: 25997 [2019-11-23 21:20:13,448 INFO L226 Difference]: Without dead ends: 14480 [2019-11-23 21:20:13,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 21:20:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2019-11-23 21:20:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 13164. [2019-11-23 21:20:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13164 states. [2019-11-23 21:20:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13470 transitions. [2019-11-23 21:20:13,629 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13470 transitions. Word has length 1840 [2019-11-23 21:20:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:13,631 INFO L462 AbstractCegarLoop]: Abstraction has 13164 states and 13470 transitions. [2019-11-23 21:20:13,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13470 transitions. [2019-11-23 21:20:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1907 [2019-11-23 21:20:13,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:13,677 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:13,677 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1110509781, now seen corresponding path program 1 times [2019-11-23 21:20:13,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:13,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623563095] [2019-11-23 21:20:13,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6971 backedges. 4858 proven. 0 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2019-11-23 21:20:16,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623563095] [2019-11-23 21:20:16,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:16,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:20:16,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193475721] [2019-11-23 21:20:16,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:20:16,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:20:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:20:16,653 INFO L87 Difference]: Start difference. First operand 13164 states and 13470 transitions. Second operand 6 states. [2019-11-23 21:20:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:19,883 INFO L93 Difference]: Finished difference Result 29945 states and 30694 transitions. [2019-11-23 21:20:19,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:20:19,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1906 [2019-11-23 21:20:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:19,911 INFO L225 Difference]: With dead ends: 29945 [2019-11-23 21:20:19,911 INFO L226 Difference]: Without dead ends: 17112 [2019-11-23 21:20:19,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:20:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17112 states. [2019-11-23 21:20:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17112 to 14151. [2019-11-23 21:20:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14151 states. [2019-11-23 21:20:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14480 transitions. [2019-11-23 21:20:20,080 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14480 transitions. Word has length 1906 [2019-11-23 21:20:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:20,081 INFO L462 AbstractCegarLoop]: Abstraction has 14151 states and 14480 transitions. [2019-11-23 21:20:20,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:20:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14480 transitions. [2019-11-23 21:20:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1980 [2019-11-23 21:20:20,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:20,150 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2019-11-23 21:20:20,150 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash -340138238, now seen corresponding path program 1 times [2019-11-23 21:20:20,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:20,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37608566] [2019-11-23 21:20:20,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6973 backedges. 4923 proven. 106 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2019-11-23 21:20:25,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37608566] [2019-11-23 21:20:25,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629728181] [2019-11-23 21:20:25,101 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 21:20:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:25,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 2265 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:20:25,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6973 backedges. 2811 proven. 0 refuted. 0 times theorem prover too weak. 4162 trivial. 0 not checked. [2019-11-23 21:20:27,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:27,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2019-11-23 21:20:27,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223198370] [2019-11-23 21:20:27,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:27,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:20:27,977 INFO L87 Difference]: Start difference. First operand 14151 states and 14480 transitions. Second operand 3 states. [2019-11-23 21:20:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:29,061 INFO L93 Difference]: Finished difference Result 27971 states and 28627 transitions. [2019-11-23 21:20:29,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:29,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1979 [2019-11-23 21:20:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:29,084 INFO L225 Difference]: With dead ends: 27971 [2019-11-23 21:20:29,084 INFO L226 Difference]: Without dead ends: 14151 [2019-11-23 21:20:29,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1988 GetRequests, 1980 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:20:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2019-11-23 21:20:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 14151. [2019-11-23 21:20:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14151 states. [2019-11-23 21:20:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14479 transitions. [2019-11-23 21:20:29,237 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14479 transitions. Word has length 1979 [2019-11-23 21:20:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:29,237 INFO L462 AbstractCegarLoop]: Abstraction has 14151 states and 14479 transitions. [2019-11-23 21:20:29,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14479 transitions. [2019-11-23 21:20:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2010 [2019-11-23 21:20:29,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:29,298 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 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 21:20:29,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:29,512 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1190378723, now seen corresponding path program 1 times [2019-11-23 21:20:29,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:29,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992857072] [2019-11-23 21:20:29,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 2737 proven. 157 refuted. 0 times theorem prover too weak. 4860 trivial. 0 not checked. [2019-11-23 21:20:33,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992857072] [2019-11-23 21:20:33,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125515933] [2019-11-23 21:20:33,528 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 21:20:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:34,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 2319 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:20:34,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 2894 proven. 0 refuted. 0 times theorem prover too weak. 4860 trivial. 0 not checked. [2019-11-23 21:20:35,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:35,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2019-11-23 21:20:35,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093882892] [2019-11-23 21:20:35,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:35,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:35,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:35,911 INFO L87 Difference]: Start difference. First operand 14151 states and 14479 transitions. Second operand 3 states. [2019-11-23 21:20:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:37,130 INFO L93 Difference]: Finished difference Result 29287 states and 29975 transitions. [2019-11-23 21:20:37,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:37,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2009 [2019-11-23 21:20:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:37,146 INFO L225 Difference]: With dead ends: 29287 [2019-11-23 21:20:37,147 INFO L226 Difference]: Without dead ends: 15467 [2019-11-23 21:20:37,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2017 GetRequests, 2008 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2019-11-23 21:20:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 15138. [2019-11-23 21:20:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2019-11-23 21:20:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15470 transitions. [2019-11-23 21:20:37,318 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15470 transitions. Word has length 2009 [2019-11-23 21:20:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:37,319 INFO L462 AbstractCegarLoop]: Abstraction has 15138 states and 15470 transitions. [2019-11-23 21:20:37,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15470 transitions. [2019-11-23 21:20:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2157 [2019-11-23 21:20:37,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:37,416 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:37,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:37,622 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:37,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:37,623 INFO L82 PathProgramCache]: Analyzing trace with hash -915672390, now seen corresponding path program 1 times [2019-11-23 21:20:37,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:37,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848481012] [2019-11-23 21:20:37,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat