/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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:23:01,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:23:01,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:23:01,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:23:01,131 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 21:23:01,163 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:23:01,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:23:01,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:23:01,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:23:01,164 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:23:01,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:23:01,168 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:23:01,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:23:01,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:23:01,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:23:01,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:23:01,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:23:01,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:23:01,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:23:01,169 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:23:01,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:23:01,170 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:23:01,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:23:01,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:23:01,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:23:01,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:23:01,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:23:01,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:23:01,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:23:01,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:23:01,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:23:01,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:23:01,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:23:01,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:23:01,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:23:01,432 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:23:01,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:23:01,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:23:01,453 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:23:01,453 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:23:01,454 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-11-23 21:23:01,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f374581/8c21d9217a544279b1f572bd6150d3c0/FLAG5de55b029 [2019-11-23 21:23:02,251 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:23:02,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-11-23 21:23:02,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f374581/8c21d9217a544279b1f572bd6150d3c0/FLAG5de55b029 [2019-11-23 21:23:02,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f374581/8c21d9217a544279b1f572bd6150d3c0 [2019-11-23 21:23:02,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:23:02,418 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:23:02,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:02,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:23:02,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:23:02,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:02" (1/1) ... [2019-11-23 21:23:02,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20bf000b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02, skipping insertion in model container [2019-11-23 21:23:02,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:02" (1/1) ... [2019-11-23 21:23:02,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:23:02,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:23:03,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:03,735 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:23:04,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:04,358 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:23:04,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04 WrapperNode [2019-11-23 21:23:04,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:04,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:04,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:23:04,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:23:04,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:04,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:23:04,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:23:04,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:23:04,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (1/1) ... [2019-11-23 21:23:04,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:23:04,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:23:04,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:23:04,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:23:04,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (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 21:23:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:23:04,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:23:08,823 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:23:08,823 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:23:08,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:08 BoogieIcfgContainer [2019-11-23 21:23:08,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:23:08,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:23:08,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:23:08,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:23:08,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:02" (1/3) ... [2019-11-23 21:23:08,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666bc180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:08, skipping insertion in model container [2019-11-23 21:23:08,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:04" (2/3) ... [2019-11-23 21:23:08,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666bc180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:08, skipping insertion in model container [2019-11-23 21:23:08,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:08" (3/3) ... [2019-11-23 21:23:08,838 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label26.c [2019-11-23 21:23:08,850 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:23:08,860 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:23:08,871 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:23:08,926 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:23:08,926 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:23:08,927 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:23:08,927 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:23:08,927 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:23:08,928 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:23:08,928 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:23:08,928 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:23:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:23:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 21:23:08,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:08,980 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] [2019-11-23 21:23:08,981 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2019-11-23 21:23:08,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:08,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280783437] [2019-11-23 21:23:08,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:09,421 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 21:23:09,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280783437] [2019-11-23 21:23:09,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:09,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:09,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84238463] [2019-11-23 21:23:09,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:09,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:09,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:09,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:09,455 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:16,291 INFO L93 Difference]: Finished difference Result 2910 states and 5661 transitions. [2019-11-23 21:23:16,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:23:16,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2019-11-23 21:23:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:16,356 INFO L225 Difference]: With dead ends: 2910 [2019-11-23 21:23:16,356 INFO L226 Difference]: Without dead ends: 2080 [2019-11-23 21:23:16,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2019-11-23 21:23:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2074. [2019-11-23 21:23:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:23:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3226 transitions. [2019-11-23 21:23:16,560 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3226 transitions. Word has length 62 [2019-11-23 21:23:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:16,562 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3226 transitions. [2019-11-23 21:23:16,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3226 transitions. [2019-11-23 21:23:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-11-23 21:23:16,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:16,581 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, 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] [2019-11-23 21:23:16,582 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:16,587 INFO L82 PathProgramCache]: Analyzing trace with hash 635859435, now seen corresponding path program 1 times [2019-11-23 21:23:16,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:16,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601575793] [2019-11-23 21:23:16,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 21:23:17,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601575793] [2019-11-23 21:23:17,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:17,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:17,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437861721] [2019-11-23 21:23:17,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:17,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:17,105 INFO L87 Difference]: Start difference. First operand 2074 states and 3226 transitions. Second operand 5 states. [2019-11-23 21:23:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:23,368 INFO L93 Difference]: Finished difference Result 6216 states and 9564 transitions. [2019-11-23 21:23:23,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:23,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2019-11-23 21:23:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:23,393 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:23:23,394 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:23:23,398 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 21:23:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:23:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:23:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:23:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5440 transitions. [2019-11-23 21:23:23,506 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5440 transitions. Word has length 222 [2019-11-23 21:23:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:23,509 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5440 transitions. [2019-11-23 21:23:23,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:23:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5440 transitions. [2019-11-23 21:23:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-11-23 21:23:23,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:23,517 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, 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] [2019-11-23 21:23:23,517 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1271081970, now seen corresponding path program 1 times [2019-11-23 21:23:23,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:23,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579868334] [2019-11-23 21:23:23,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 119 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 21:23:23,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579868334] [2019-11-23 21:23:23,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069013407] [2019-11-23 21:23:23,808 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 21:23:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:23,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:23,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:24,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:24,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:23:24,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407639544] [2019-11-23 21:23:24,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:24,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:24,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:24,019 INFO L87 Difference]: Start difference. First operand 4144 states and 5440 transitions. Second operand 3 states. [2019-11-23 21:23:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:28,205 INFO L93 Difference]: Finished difference Result 9666 states and 13519 transitions. [2019-11-23 21:23:28,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:28,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 311 [2019-11-23 21:23:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:28,231 INFO L225 Difference]: With dead ends: 9666 [2019-11-23 21:23:28,232 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:23:28,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:23:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:23:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:23:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 7930 transitions. [2019-11-23 21:23:28,344 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 7930 transitions. Word has length 311 [2019-11-23 21:23:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:28,345 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 7930 transitions. [2019-11-23 21:23:28,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 7930 transitions. [2019-11-23 21:23:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-11-23 21:23:28,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:28,353 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, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:23:28,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:28,558 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1221448418, now seen corresponding path program 1 times [2019-11-23 21:23:28,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:28,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145412627] [2019-11-23 21:23:28,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 196 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 21:23:29,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145412627] [2019-11-23 21:23:29,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803419523] [2019-11-23 21:23:29,067 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 21:23:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:29,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:29,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-23 21:23:29,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:29,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2019-11-23 21:23:29,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426569185] [2019-11-23 21:23:29,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:29,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:29,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:29,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:29,340 INFO L87 Difference]: Start difference. First operand 6214 states and 7930 transitions. Second operand 3 states. [2019-11-23 21:23:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:33,023 INFO L93 Difference]: Finished difference Result 15186 states and 20095 transitions. [2019-11-23 21:23:33,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:33,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2019-11-23 21:23:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:33,064 INFO L225 Difference]: With dead ends: 15186 [2019-11-23 21:23:33,064 INFO L226 Difference]: Without dead ends: 9664 [2019-11-23 21:23:33,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 333 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 21:23:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2019-11-23 21:23:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2019-11-23 21:23:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:23:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10979 transitions. [2019-11-23 21:23:33,245 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10979 transitions. Word has length 334 [2019-11-23 21:23:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:33,246 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 10979 transitions. [2019-11-23 21:23:33,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10979 transitions. [2019-11-23 21:23:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2019-11-23 21:23:33,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:33,256 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, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:33,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:33,461 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -651769147, now seen corresponding path program 1 times [2019-11-23 21:23:33,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:33,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361689922] [2019-11-23 21:23:33,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 364 proven. 3 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 21:23:33,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361689922] [2019-11-23 21:23:33,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751558097] [2019-11-23 21:23:33,978 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 21:23:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:34,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:34,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:23:34,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:34,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:34,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563442555] [2019-11-23 21:23:34,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:34,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:34,279 INFO L87 Difference]: Start difference. First operand 8974 states and 10979 transitions. Second operand 3 states. [2019-11-23 21:23:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:38,138 INFO L93 Difference]: Finished difference Result 24846 states and 30838 transitions. [2019-11-23 21:23:38,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:38,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 452 [2019-11-23 21:23:38,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:38,183 INFO L225 Difference]: With dead ends: 24846 [2019-11-23 21:23:38,184 INFO L226 Difference]: Without dead ends: 16564 [2019-11-23 21:23:38,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 451 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 21:23:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2019-11-23 21:23:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 15874. [2019-11-23 21:23:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15874 states. [2019-11-23 21:23:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15874 states to 15874 states and 19471 transitions. [2019-11-23 21:23:38,417 INFO L78 Accepts]: Start accepts. Automaton has 15874 states and 19471 transitions. Word has length 452 [2019-11-23 21:23:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:38,418 INFO L462 AbstractCegarLoop]: Abstraction has 15874 states and 19471 transitions. [2019-11-23 21:23:38,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15874 states and 19471 transitions. [2019-11-23 21:23:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2019-11-23 21:23:38,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:38,430 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:23:38,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:38,635 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:38,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1334396262, now seen corresponding path program 1 times [2019-11-23 21:23:38,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:38,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817856195] [2019-11-23 21:23:38,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 474 proven. 3 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-23 21:23:39,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817856195] [2019-11-23 21:23:39,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683294195] [2019-11-23 21:23:39,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:39,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:39,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 21:23:39,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:39,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:39,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117885288] [2019-11-23 21:23:39,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:39,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:39,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:39,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:39,942 INFO L87 Difference]: Start difference. First operand 15874 states and 19471 transitions. Second operand 3 states. [2019-11-23 21:23:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:43,613 INFO L93 Difference]: Finished difference Result 37956 states and 48062 transitions. [2019-11-23 21:23:43,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:43,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 512 [2019-11-23 21:23:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:43,660 INFO L225 Difference]: With dead ends: 37956 [2019-11-23 21:23:43,661 INFO L226 Difference]: Without dead ends: 22774 [2019-11-23 21:23:43,677 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 511 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 21:23:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2019-11-23 21:23:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22774. [2019-11-23 21:23:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22774 states. [2019-11-23 21:23:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22774 states to 22774 states and 28347 transitions. [2019-11-23 21:23:43,978 INFO L78 Accepts]: Start accepts. Automaton has 22774 states and 28347 transitions. Word has length 512 [2019-11-23 21:23:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:43,979 INFO L462 AbstractCegarLoop]: Abstraction has 22774 states and 28347 transitions. [2019-11-23 21:23:43,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand 22774 states and 28347 transitions. [2019-11-23 21:23:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2019-11-23 21:23:43,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:43,996 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, 4, 4, 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, 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] [2019-11-23 21:23:44,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:44,200 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash -561266096, now seen corresponding path program 1 times [2019-11-23 21:23:44,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:44,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881881485] [2019-11-23 21:23:44,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 542 proven. 3 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-11-23 21:23:45,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881881485] [2019-11-23 21:23:45,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905802408] [2019-11-23 21:23:45,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:45,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:45,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2019-11-23 21:23:45,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:45,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:45,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070933574] [2019-11-23 21:23:45,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:45,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:45,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:45,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:45,938 INFO L87 Difference]: Start difference. First operand 22774 states and 28347 transitions. Second operand 3 states. [2019-11-23 21:23:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:49,416 INFO L93 Difference]: Finished difference Result 44856 states and 55996 transitions. [2019-11-23 21:23:49,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:49,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 580 [2019-11-23 21:23:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:49,447 INFO L225 Difference]: With dead ends: 44856 [2019-11-23 21:23:49,448 INFO L226 Difference]: Without dead ends: 22774 [2019-11-23 21:23:49,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 579 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:49,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2019-11-23 21:23:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22084. [2019-11-23 21:23:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22084 states. [2019-11-23 21:23:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 25627 transitions. [2019-11-23 21:23:49,745 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 25627 transitions. Word has length 580 [2019-11-23 21:23:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:49,746 INFO L462 AbstractCegarLoop]: Abstraction has 22084 states and 25627 transitions. [2019-11-23 21:23:49,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 25627 transitions. [2019-11-23 21:23:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2019-11-23 21:23:49,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:49,756 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2019-11-23 21:23:49,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:49,960 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:49,960 INFO L82 PathProgramCache]: Analyzing trace with hash -65682616, now seen corresponding path program 1 times [2019-11-23 21:23:49,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:49,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808503604] [2019-11-23 21:23:49,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 572 proven. 3 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2019-11-23 21:23:50,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808503604] [2019-11-23 21:23:50,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809240793] [2019-11-23 21:23:50,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:50,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:50,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2019-11-23 21:23:50,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:50,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:50,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760186718] [2019-11-23 21:23:50,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:50,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:50,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:50,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:50,997 INFO L87 Difference]: Start difference. First operand 22084 states and 25627 transitions. Second operand 3 states. [2019-11-23 21:23:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:55,230 INFO L93 Difference]: Finished difference Result 53136 states and 62060 transitions. [2019-11-23 21:23:55,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:55,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 610 [2019-11-23 21:23:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:55,278 INFO L225 Difference]: With dead ends: 53136 [2019-11-23 21:23:55,278 INFO L226 Difference]: Without dead ends: 31744 [2019-11-23 21:23:55,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 609 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31744 states. [2019-11-23 21:23:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31744 to 30364. [2019-11-23 21:23:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30364 states. [2019-11-23 21:23:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 34639 transitions. [2019-11-23 21:23:55,672 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 34639 transitions. Word has length 610 [2019-11-23 21:23:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:55,673 INFO L462 AbstractCegarLoop]: Abstraction has 30364 states and 34639 transitions. [2019-11-23 21:23:55,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 34639 transitions. [2019-11-23 21:23:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2019-11-23 21:23:55,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:55,686 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2019-11-23 21:23:55,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:55,891 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash 246958407, now seen corresponding path program 1 times [2019-11-23 21:23:55,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:55,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558459908] [2019-11-23 21:23:55,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 645 proven. 3 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2019-11-23 21:23:57,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558459908] [2019-11-23 21:23:57,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839943819] [2019-11-23 21:23:57,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:57,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:57,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 673 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2019-11-23 21:23:57,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:57,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:57,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256768592] [2019-11-23 21:23:57,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:57,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:57,814 INFO L87 Difference]: Start difference. First operand 30364 states and 34639 transitions. Second operand 3 states. [2019-11-23 21:24:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:01,239 INFO L93 Difference]: Finished difference Result 66246 states and 75870 transitions. [2019-11-23 21:24:01,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:01,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 633 [2019-11-23 21:24:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:01,294 INFO L225 Difference]: With dead ends: 66246 [2019-11-23 21:24:01,295 INFO L226 Difference]: Without dead ends: 36574 [2019-11-23 21:24:01,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 632 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 21:24:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36574 states. [2019-11-23 21:24:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36574 to 36574. [2019-11-23 21:24:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36574 states. [2019-11-23 21:24:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36574 states to 36574 states and 41221 transitions. [2019-11-23 21:24:01,688 INFO L78 Accepts]: Start accepts. Automaton has 36574 states and 41221 transitions. Word has length 633 [2019-11-23 21:24:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:01,689 INFO L462 AbstractCegarLoop]: Abstraction has 36574 states and 41221 transitions. [2019-11-23 21:24:01,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 36574 states and 41221 transitions. [2019-11-23 21:24:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2019-11-23 21:24:01,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:01,703 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, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:01,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:01,907 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:01,907 INFO L82 PathProgramCache]: Analyzing trace with hash 436956624, now seen corresponding path program 1 times [2019-11-23 21:24:01,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:01,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10927810] [2019-11-23 21:24:01,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 596 proven. 3 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 21:24:02,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10927810] [2019-11-23 21:24:02,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094598900] [2019-11-23 21:24:02,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:02,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:02,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 21:24:02,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:02,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:02,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544864369] [2019-11-23 21:24:02,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:02,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:02,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:02,900 INFO L87 Difference]: Start difference. First operand 36574 states and 41221 transitions. Second operand 3 states. [2019-11-23 21:24:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:06,566 INFO L93 Difference]: Finished difference Result 73146 states and 82446 transitions. [2019-11-23 21:24:06,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:06,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 658 [2019-11-23 21:24:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:06,611 INFO L225 Difference]: With dead ends: 73146 [2019-11-23 21:24:06,611 INFO L226 Difference]: Without dead ends: 37264 [2019-11-23 21:24:06,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 657 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 21:24:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37264 states. [2019-11-23 21:24:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37264 to 35194. [2019-11-23 21:24:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35194 states. [2019-11-23 21:24:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35194 states to 35194 states and 39595 transitions. [2019-11-23 21:24:06,934 INFO L78 Accepts]: Start accepts. Automaton has 35194 states and 39595 transitions. Word has length 658 [2019-11-23 21:24:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:06,934 INFO L462 AbstractCegarLoop]: Abstraction has 35194 states and 39595 transitions. [2019-11-23 21:24:06,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35194 states and 39595 transitions. [2019-11-23 21:24:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2019-11-23 21:24:06,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:06,947 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:07,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:07,151 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1507173427, now seen corresponding path program 1 times [2019-11-23 21:24:07,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:07,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373388819] [2019-11-23 21:24:07,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 693 proven. 3 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2019-11-23 21:24:08,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373388819] [2019-11-23 21:24:08,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227780954] [2019-11-23 21:24:08,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:08,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:08,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 877 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-23 21:24:08,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:08,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:08,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823362563] [2019-11-23 21:24:08,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:08,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:08,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:08,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:08,606 INFO L87 Difference]: Start difference. First operand 35194 states and 39595 transitions. Second operand 3 states. [2019-11-23 21:24:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:12,376 INFO L93 Difference]: Finished difference Result 78666 states and 88964 transitions. [2019-11-23 21:24:12,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:12,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 681 [2019-11-23 21:24:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:12,411 INFO L225 Difference]: With dead ends: 78666 [2019-11-23 21:24:12,411 INFO L226 Difference]: Without dead ends: 44164 [2019-11-23 21:24:12,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 680 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 21:24:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44164 states. [2019-11-23 21:24:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44164 to 42094. [2019-11-23 21:24:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42094 states. [2019-11-23 21:24:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 47209 transitions. [2019-11-23 21:24:12,721 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 47209 transitions. Word has length 681 [2019-11-23 21:24:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:12,721 INFO L462 AbstractCegarLoop]: Abstraction has 42094 states and 47209 transitions. [2019-11-23 21:24:12,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 47209 transitions. [2019-11-23 21:24:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2019-11-23 21:24:12,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:12,732 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-11-23 21:24:12,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:12,936 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash -360602626, now seen corresponding path program 1 times [2019-11-23 21:24:12,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:12,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483820283] [2019-11-23 21:24:12,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 781 proven. 3 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2019-11-23 21:24:13,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483820283] [2019-11-23 21:24:13,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982904409] [2019-11-23 21:24:13,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:13,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:13,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2019-11-23 21:24:14,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:14,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:14,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979895113] [2019-11-23 21:24:14,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:14,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:14,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:14,167 INFO L87 Difference]: Start difference. First operand 42094 states and 47209 transitions. Second operand 3 states. [2019-11-23 21:24:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:17,865 INFO L93 Difference]: Finished difference Result 91086 states and 102482 transitions. [2019-11-23 21:24:17,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:17,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 719 [2019-11-23 21:24:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:17,908 INFO L225 Difference]: With dead ends: 91086 [2019-11-23 21:24:17,908 INFO L226 Difference]: Without dead ends: 49684 [2019-11-23 21:24:17,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 718 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 21:24:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2019-11-23 21:24:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48994. [2019-11-23 21:24:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48994 states.