/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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:24:13,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:24:13,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:24:13,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:24:13,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:24:13,409 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:24:13,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:24:13,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:24:13,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:24:13,412 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:24:13,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:24:13,412 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:24:13,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:24:13,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:24:13,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:24:13,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:24:13,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:24:13,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:24:13,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:24:13,415 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:24:13,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:24:13,415 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:24:13,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:24:13,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:24:13,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:24:13,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:24:13,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:24:13,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:24:13,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:24:13,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:24:13,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:24:13,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:24:13,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:24:13,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:24:13,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:24:13,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:24:13,731 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:24:13,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:24:13,736 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:24:13,736 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:24:13,737 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-11-23 21:24:13,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115155918/753262a05c1740e8bf2d080c4e3840a7/FLAG27d1144a3 [2019-11-23 21:24:14,472 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:24:14,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-11-23 21:24:14,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115155918/753262a05c1740e8bf2d080c4e3840a7/FLAG27d1144a3 [2019-11-23 21:24:14,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115155918/753262a05c1740e8bf2d080c4e3840a7 [2019-11-23 21:24:14,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:24:14,640 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:24:14,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:14,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:24:14,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:24:14,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:14" (1/1) ... [2019-11-23 21:24:14,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bed0f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:14, skipping insertion in model container [2019-11-23 21:24:14,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:14" (1/1) ... [2019-11-23 21:24:14,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:24:14,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:24:16,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:16,306 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:24:16,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:16,851 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:24:16,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16 WrapperNode [2019-11-23 21:24:16,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:16,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:16,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:24:16,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:24:16,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:16,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:17,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:24:17,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:24:17,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:24:17,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2019-11-23 21:24:17,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:24:17,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:24:17,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:24:17,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:24:17,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:24:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:24:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:24:21,683 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:24:21,683 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:24:21,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:21 BoogieIcfgContainer [2019-11-23 21:24:21,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:24:21,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:24:21,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:24:21,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:24:21,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:14" (1/3) ... [2019-11-23 21:24:21,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5657f014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:21, skipping insertion in model container [2019-11-23 21:24:21,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (2/3) ... [2019-11-23 21:24:21,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5657f014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:21, skipping insertion in model container [2019-11-23 21:24:21,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:21" (3/3) ... [2019-11-23 21:24:21,694 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label42.c [2019-11-23 21:24:21,704 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:24:21,712 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:24:21,726 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:24:21,775 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:24:21,776 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:24:21,776 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:24:21,776 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:24:21,776 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:24:21,777 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:24:21,777 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:24:21,777 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:24:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:24:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 21:24:21,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:21,823 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] [2019-11-23 21:24:21,824 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:21,830 INFO L82 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2019-11-23 21:24:21,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:21,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689094213] [2019-11-23 21:24:21,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:24:22,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689094213] [2019-11-23 21:24:22,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:22,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:22,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883441127] [2019-11-23 21:24:22,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:22,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:22,133 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:24:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:28,828 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2019-11-23 21:24:28,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:28,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2019-11-23 21:24:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:28,876 INFO L225 Difference]: With dead ends: 2898 [2019-11-23 21:24:28,876 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:24:28,889 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 21:24:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:24:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:24:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:24:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3388 transitions. [2019-11-23 21:24:29,045 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3388 transitions. Word has length 49 [2019-11-23 21:24:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:29,045 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3388 transitions. [2019-11-23 21:24:29,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3388 transitions. [2019-11-23 21:24:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 21:24:29,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:29,051 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:29,051 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1444141988, now seen corresponding path program 1 times [2019-11-23 21:24:29,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:29,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767904370] [2019-11-23 21:24:29,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:24:29,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767904370] [2019-11-23 21:24:29,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:29,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:29,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691506389] [2019-11-23 21:24:29,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:29,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:29,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:29,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:29,277 INFO L87 Difference]: Start difference. First operand 2074 states and 3388 transitions. Second operand 4 states. [2019-11-23 21:24:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:35,315 INFO L93 Difference]: Finished difference Result 8286 states and 13544 transitions. [2019-11-23 21:24:35,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:35,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-11-23 21:24:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:35,349 INFO L225 Difference]: With dead ends: 8286 [2019-11-23 21:24:35,350 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:24:35,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 21:24:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:24:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:24:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:24:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 8694 transitions. [2019-11-23 21:24:35,474 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 8694 transitions. Word has length 133 [2019-11-23 21:24:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:35,478 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 8694 transitions. [2019-11-23 21:24:35,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 8694 transitions. [2019-11-23 21:24:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-11-23 21:24:35,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:35,495 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:35,495 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1112812087, now seen corresponding path program 1 times [2019-11-23 21:24:35,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:35,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647507233] [2019-11-23 21:24:35,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 21:24:36,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647507233] [2019-11-23 21:24:36,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:36,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:36,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892794674] [2019-11-23 21:24:36,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:24:36,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:24:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:24:36,187 INFO L87 Difference]: Start difference. First operand 6214 states and 8694 transitions. Second operand 5 states. [2019-11-23 21:24:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:41,702 INFO L93 Difference]: Finished difference Result 15186 states and 20554 transitions. [2019-11-23 21:24:41,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:41,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 298 [2019-11-23 21:24:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:41,742 INFO L225 Difference]: With dead ends: 15186 [2019-11-23 21:24:41,742 INFO L226 Difference]: Without dead ends: 8974 [2019-11-23 21:24:41,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2019-11-23 21:24:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8974. [2019-11-23 21:24:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:24:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 11724 transitions. [2019-11-23 21:24:41,913 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 11724 transitions. Word has length 298 [2019-11-23 21:24:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:41,914 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 11724 transitions. [2019-11-23 21:24:41,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:24:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 11724 transitions. [2019-11-23 21:24:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2019-11-23 21:24:41,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:41,930 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, 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, 1, 1, 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 21:24:41,931 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1005426225, now seen corresponding path program 1 times [2019-11-23 21:24:41,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:41,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380551218] [2019-11-23 21:24:41,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 290 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-23 21:24:42,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380551218] [2019-11-23 21:24:42,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830023561] [2019-11-23 21:24:42,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:42,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:42,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 21:24:42,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:42,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:24:42,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822049869] [2019-11-23 21:24:42,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:42,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:42,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:42,719 INFO L87 Difference]: Start difference. First operand 8974 states and 11724 transitions. Second operand 3 states. [2019-11-23 21:24:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:46,437 INFO L93 Difference]: Finished difference Result 24846 states and 32905 transitions. [2019-11-23 21:24:46,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:46,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 429 [2019-11-23 21:24:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:46,516 INFO L225 Difference]: With dead ends: 24846 [2019-11-23 21:24:46,516 INFO L226 Difference]: Without dead ends: 15874 [2019-11-23 21:24:46,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2019-11-23 21:24:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 15184. [2019-11-23 21:24:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15184 states. [2019-11-23 21:24:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15184 states to 15184 states and 18765 transitions. [2019-11-23 21:24:46,855 INFO L78 Accepts]: Start accepts. Automaton has 15184 states and 18765 transitions. Word has length 429 [2019-11-23 21:24:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:46,857 INFO L462 AbstractCegarLoop]: Abstraction has 15184 states and 18765 transitions. [2019-11-23 21:24:46,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 15184 states and 18765 transitions. [2019-11-23 21:24:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2019-11-23 21:24:46,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:46,871 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:47,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:47,086 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:47,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1618390399, now seen corresponding path program 1 times [2019-11-23 21:24:47,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:47,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622685110] [2019-11-23 21:24:47,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 388 proven. 3 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-23 21:24:47,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622685110] [2019-11-23 21:24:47,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874951462] [2019-11-23 21:24:47,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:48,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 21:24:48,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-23 21:24:48,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:48,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:24:48,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867438939] [2019-11-23 21:24:48,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:48,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:48,295 INFO L87 Difference]: Start difference. First operand 15184 states and 18765 transitions. Second operand 4 states. [2019-11-23 21:24:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:52,004 INFO L93 Difference]: Finished difference Result 30419 states and 37581 transitions. [2019-11-23 21:24:52,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:52,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2019-11-23 21:24:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:52,033 INFO L225 Difference]: With dead ends: 30419 [2019-11-23 21:24:52,033 INFO L226 Difference]: Without dead ends: 15184 [2019-11-23 21:24:52,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 479 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15184 states. [2019-11-23 21:24:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15184 to 15184. [2019-11-23 21:24:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15184 states. [2019-11-23 21:24:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15184 states to 15184 states and 16996 transitions. [2019-11-23 21:24:52,300 INFO L78 Accepts]: Start accepts. Automaton has 15184 states and 16996 transitions. Word has length 480 [2019-11-23 21:24:52,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:52,301 INFO L462 AbstractCegarLoop]: Abstraction has 15184 states and 16996 transitions. [2019-11-23 21:24:52,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 15184 states and 16996 transitions. [2019-11-23 21:24:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2019-11-23 21:24:52,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:52,325 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:52,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:52,530 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:52,531 INFO L82 PathProgramCache]: Analyzing trace with hash -175470852, now seen corresponding path program 1 times [2019-11-23 21:24:52,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:52,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942274546] [2019-11-23 21:24:52,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 194 proven. 409 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-23 21:24:53,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942274546] [2019-11-23 21:24:53,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333592263] [2019-11-23 21:24:53,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:53,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:53,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 470 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-11-23 21:24:54,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:54,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:24:54,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972201994] [2019-11-23 21:24:54,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:54,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:24:54,169 INFO L87 Difference]: Start difference. First operand 15184 states and 16996 transitions. Second operand 3 states. [2019-11-23 21:24:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:57,172 INFO L93 Difference]: Finished difference Result 42096 states and 47452 transitions. [2019-11-23 21:24:57,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:57,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 632 [2019-11-23 21:24:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:57,226 INFO L225 Difference]: With dead ends: 42096 [2019-11-23 21:24:57,226 INFO L226 Difference]: Without dead ends: 26914 [2019-11-23 21:24:57,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 631 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:24:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2019-11-23 21:24:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 25534. [2019-11-23 21:24:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25534 states. [2019-11-23 21:24:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 28361 transitions. [2019-11-23 21:24:57,550 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 28361 transitions. Word has length 632 [2019-11-23 21:24:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:57,558 INFO L462 AbstractCegarLoop]: Abstraction has 25534 states and 28361 transitions. [2019-11-23 21:24:57,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 28361 transitions. [2019-11-23 21:24:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1170 [2019-11-23 21:24:57,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:57,608 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:24:57,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:57,816 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash 750872433, now seen corresponding path program 1 times [2019-11-23 21:24:57,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:57,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714657934] [2019-11-23 21:24:57,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 668 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-11-23 21:24:59,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714657934] [2019-11-23 21:24:59,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:59,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:59,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327757838] [2019-11-23 21:24:59,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:59,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:59,611 INFO L87 Difference]: Start difference. First operand 25534 states and 28361 transitions. Second operand 4 states. [2019-11-23 21:25:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:04,193 INFO L93 Difference]: Finished difference Result 57966 states and 64691 transitions. [2019-11-23 21:25:04,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:04,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1169 [2019-11-23 21:25:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:04,231 INFO L225 Difference]: With dead ends: 57966 [2019-11-23 21:25:04,231 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:25:04,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:25:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 30364. [2019-11-23 21:25:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30364 states. [2019-11-23 21:25:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 32568 transitions. [2019-11-23 21:25:04,597 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 32568 transitions. Word has length 1169 [2019-11-23 21:25:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:04,599 INFO L462 AbstractCegarLoop]: Abstraction has 30364 states and 32568 transitions. [2019-11-23 21:25:04,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 32568 transitions. [2019-11-23 21:25:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1203 [2019-11-23 21:25:04,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:04,638 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:04,638 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:04,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:04,639 INFO L82 PathProgramCache]: Analyzing trace with hash 373239474, now seen corresponding path program 1 times [2019-11-23 21:25:04,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:04,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630123905] [2019-11-23 21:25:04,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 851 proven. 743 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-23 21:25:08,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630123905] [2019-11-23 21:25:08,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743274517] [2019-11-23 21:25:08,253 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 21:25:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:08,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:25:08,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 992 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 21:25:09,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:09,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-11-23 21:25:09,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230158704] [2019-11-23 21:25:09,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:09,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-23 21:25:09,176 INFO L87 Difference]: Start difference. First operand 30364 states and 32568 transitions. Second operand 3 states. [2019-11-23 21:25:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:11,900 INFO L93 Difference]: Finished difference Result 67626 states and 72673 transitions. [2019-11-23 21:25:11,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:11,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1202 [2019-11-23 21:25:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:11,942 INFO L225 Difference]: With dead ends: 67626 [2019-11-23 21:25:11,943 INFO L226 Difference]: Without dead ends: 37954 [2019-11-23 21:25:11,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1202 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-23 21:25:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37954 states. [2019-11-23 21:25:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37954 to 37264. [2019-11-23 21:25:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37264 states. [2019-11-23 21:25:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37264 states to 37264 states and 39825 transitions. [2019-11-23 21:25:12,558 INFO L78 Accepts]: Start accepts. Automaton has 37264 states and 39825 transitions. Word has length 1202 [2019-11-23 21:25:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:12,560 INFO L462 AbstractCegarLoop]: Abstraction has 37264 states and 39825 transitions. [2019-11-23 21:25:12,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 37264 states and 39825 transitions. [2019-11-23 21:25:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1204 [2019-11-23 21:25:12,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:12,581 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:12,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:12,786 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:12,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1285937321, now seen corresponding path program 1 times [2019-11-23 21:25:12,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:12,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37466319] [2019-11-23 21:25:12,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 1066 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2019-11-23 21:25:14,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37466319] [2019-11-23 21:25:14,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:14,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:14,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298846752] [2019-11-23 21:25:14,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:14,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:14,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:14,082 INFO L87 Difference]: Start difference. First operand 37264 states and 39825 transitions. Second operand 4 states. [2019-11-23 21:25:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:19,165 INFO L93 Difference]: Finished difference Result 95916 states and 103268 transitions. [2019-11-23 21:25:19,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:19,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1203 [2019-11-23 21:25:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:19,237 INFO L225 Difference]: With dead ends: 95916 [2019-11-23 21:25:19,241 INFO L226 Difference]: Without dead ends: 59344 [2019-11-23 21:25:19,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59344 states. [2019-11-23 21:25:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59344 to 57274. [2019-11-23 21:25:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57274 states. [2019-11-23 21:25:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57274 states to 57274 states and 60922 transitions. [2019-11-23 21:25:19,872 INFO L78 Accepts]: Start accepts. Automaton has 57274 states and 60922 transitions. Word has length 1203 [2019-11-23 21:25:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:19,875 INFO L462 AbstractCegarLoop]: Abstraction has 57274 states and 60922 transitions. [2019-11-23 21:25:19,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 57274 states and 60922 transitions. [2019-11-23 21:25:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1209 [2019-11-23 21:25:19,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:19,913 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:19,913 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:19,916 INFO L82 PathProgramCache]: Analyzing trace with hash -367957754, now seen corresponding path program 1 times [2019-11-23 21:25:19,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:19,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573230089] [2019-11-23 21:25:19,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1690 backedges. 701 proven. 47 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-11-23 21:25:22,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573230089] [2019-11-23 21:25:22,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133602245] [2019-11-23 21:25:22,928 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 21:25:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:23,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:23,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1690 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 1409 trivial. 0 not checked. [2019-11-23 21:25:23,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:23,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-11-23 21:25:23,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582413281] [2019-11-23 21:25:23,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:23,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:23,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:23,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:25:23,694 INFO L87 Difference]: Start difference. First operand 57274 states and 60922 transitions. Second operand 3 states. [2019-11-23 21:25:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:26,535 INFO L93 Difference]: Finished difference Result 113856 states and 121151 transitions. [2019-11-23 21:25:26,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:26,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1208 [2019-11-23 21:25:26,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:26,594 INFO L225 Difference]: With dead ends: 113856 [2019-11-23 21:25:26,594 INFO L226 Difference]: Without dead ends: 57274 [2019-11-23 21:25:26,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1208 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:25:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57274 states. [2019-11-23 21:25:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57274 to 57274. [2019-11-23 21:25:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57274 states. [2019-11-23 21:25:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57274 states to 57274 states and 60680 transitions. [2019-11-23 21:25:27,037 INFO L78 Accepts]: Start accepts. Automaton has 57274 states and 60680 transitions. Word has length 1208 [2019-11-23 21:25:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:27,038 INFO L462 AbstractCegarLoop]: Abstraction has 57274 states and 60680 transitions. [2019-11-23 21:25:27,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 57274 states and 60680 transitions. [2019-11-23 21:25:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1242 [2019-11-23 21:25:27,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:27,059 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:25:27,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:27,261 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1272042909, now seen corresponding path program 1 times [2019-11-23 21:25:27,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:27,263 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340817568] [2019-11-23 21:25:27,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 1166 proven. 0 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2019-11-23 21:25:29,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340817568] [2019-11-23 21:25:29,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:29,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:29,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152964378] [2019-11-23 21:25:29,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:29,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:29,395 INFO L87 Difference]: Start difference. First operand 57274 states and 60680 transitions. Second operand 4 states.