/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/Problem14_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:10:50,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:10:50,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:10:50,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:10:50,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:10:50,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:10:50,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:10:50,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:10:50,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:10:50,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:10:50,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:10:50,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:10:50,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:10:50,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:10:50,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:10:50,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:10:50,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:10:50,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:10:50,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:10:50,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:10:50,711 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 21:10:50,738 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:10:50,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:10:50,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:10:50,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:10:50,740 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:10:50,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:10:50,741 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:10:50,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:10:50,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:10:50,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:10:50,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:10:50,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:10:50,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:10:50,742 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:10:50,742 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:10:50,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:10:50,744 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:10:50,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:10:50,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:10:50,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:10:50,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:10:50,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:10:50,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:10:50,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:10:50,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:10:50,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:10:50,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:10:50,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:10:50,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:10:50,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:10:51,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:10:51,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:10:51,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:10:51,067 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:10:51,067 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:10:51,068 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label09.c [2019-11-23 21:10:51,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebd4c7b9/c70984e01d7f41a690073a4894d05dbf/FLAGdb99a2b50 [2019-11-23 21:10:51,717 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:10:51,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label09.c [2019-11-23 21:10:51,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebd4c7b9/c70984e01d7f41a690073a4894d05dbf/FLAGdb99a2b50 [2019-11-23 21:10:51,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebd4c7b9/c70984e01d7f41a690073a4894d05dbf [2019-11-23 21:10:51,999 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:10:52,001 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:10:52,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:10:52,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:10:52,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:10:52,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:51" (1/1) ... [2019-11-23 21:10:52,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cfe757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52, skipping insertion in model container [2019-11-23 21:10:52,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:51" (1/1) ... [2019-11-23 21:10:52,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:10:52,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:10:52,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:10:52,621 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:10:52,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:10:52,881 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:10:52,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52 WrapperNode [2019-11-23 21:10:52,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:10:52,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:10:52,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:10:52,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:10:52,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:52,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:10:53,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:10:53,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:10:53,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:10:53,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (1/1) ... [2019-11-23 21:10:53,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:10:53,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:10:53,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:10:53,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:10:53,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (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 21:10:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:10:53,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:10:54,744 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:10:54,745 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 21:10:54,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:54 BoogieIcfgContainer [2019-11-23 21:10:54,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:10:54,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:10:54,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:10:54,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:10:54,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:10:51" (1/3) ... [2019-11-23 21:10:54,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8b6f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:54, skipping insertion in model container [2019-11-23 21:10:54,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:52" (2/3) ... [2019-11-23 21:10:54,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8b6f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:54, skipping insertion in model container [2019-11-23 21:10:54,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:54" (3/3) ... [2019-11-23 21:10:54,761 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label09.c [2019-11-23 21:10:54,770 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:10:54,778 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:10:54,789 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:10:54,829 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:10:54,829 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:10:54,829 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:10:54,829 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:10:54,829 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:10:54,830 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:10:54,831 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:10:54,831 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:10:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states. [2019-11-23 21:10:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 21:10:54,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:54,878 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] [2019-11-23 21:10:54,878 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:54,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2019-11-23 21:10:54,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:54,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480459213] [2019-11-23 21:10:54,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:55,179 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 21:10:55,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480459213] [2019-11-23 21:10:55,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:55,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:10:55,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795856599] [2019-11-23 21:10:55,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:55,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:55,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:55,205 INFO L87 Difference]: Start difference. First operand 245 states. Second operand 4 states. [2019-11-23 21:10:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:57,090 INFO L93 Difference]: Finished difference Result 850 states and 1558 transitions. [2019-11-23 21:10:57,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:57,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-11-23 21:10:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:57,113 INFO L225 Difference]: With dead ends: 850 [2019-11-23 21:10:57,113 INFO L226 Difference]: Without dead ends: 538 [2019-11-23 21:10:57,119 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 21:10:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-11-23 21:10:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2019-11-23 21:10:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2019-11-23 21:10:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 826 transitions. [2019-11-23 21:10:57,199 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 826 transitions. Word has length 45 [2019-11-23 21:10:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:57,200 INFO L462 AbstractCegarLoop]: Abstraction has 538 states and 826 transitions. [2019-11-23 21:10:57,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 826 transitions. [2019-11-23 21:10:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-23 21:10:57,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:57,205 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, 1, 1, 1, 1, 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 21:10:57,206 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash 661504820, now seen corresponding path program 1 times [2019-11-23 21:10:57,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:57,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771294213] [2019-11-23 21:10:57,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:57,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771294213] [2019-11-23 21:10:57,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:57,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:10:57,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018288097] [2019-11-23 21:10:57,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:57,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:57,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:57,377 INFO L87 Difference]: Start difference. First operand 538 states and 826 transitions. Second operand 4 states. [2019-11-23 21:10:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:58,948 INFO L93 Difference]: Finished difference Result 2142 states and 3296 transitions. [2019-11-23 21:10:58,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:58,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2019-11-23 21:10:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:58,962 INFO L225 Difference]: With dead ends: 2142 [2019-11-23 21:10:58,962 INFO L226 Difference]: Without dead ends: 1606 [2019-11-23 21:10:58,965 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 21:10:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2019-11-23 21:10:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1428. [2019-11-23 21:10:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1428 states. [2019-11-23 21:10:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2029 transitions. [2019-11-23 21:10:59,034 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2029 transitions. Word has length 110 [2019-11-23 21:10:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:59,036 INFO L462 AbstractCegarLoop]: Abstraction has 1428 states and 2029 transitions. [2019-11-23 21:10:59,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2029 transitions. [2019-11-23 21:10:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 21:10:59,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:59,041 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, 1, 1, 1, 1, 1, 1, 1, 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 21:10:59,042 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1476660258, now seen corresponding path program 1 times [2019-11-23 21:10:59,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:59,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632624537] [2019-11-23 21:10:59,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:59,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632624537] [2019-11-23 21:10:59,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:59,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:10:59,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354829345] [2019-11-23 21:10:59,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:59,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:59,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:59,182 INFO L87 Difference]: Start difference. First operand 1428 states and 2029 transitions. Second operand 4 states. [2019-11-23 21:11:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:00,466 INFO L93 Difference]: Finished difference Result 4634 states and 6631 transitions. [2019-11-23 21:11:00,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:11:00,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-11-23 21:11:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:00,485 INFO L225 Difference]: With dead ends: 4634 [2019-11-23 21:11:00,486 INFO L226 Difference]: Without dead ends: 3208 [2019-11-23 21:11:00,489 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 21:11:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2019-11-23 21:11:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2674. [2019-11-23 21:11:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2019-11-23 21:11:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3515 transitions. [2019-11-23 21:11:00,549 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3515 transitions. Word has length 113 [2019-11-23 21:11:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:00,550 INFO L462 AbstractCegarLoop]: Abstraction has 2674 states and 3515 transitions. [2019-11-23 21:11:00,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:11:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3515 transitions. [2019-11-23 21:11:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-11-23 21:11:00,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:00,558 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:00,558 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash 359394002, now seen corresponding path program 1 times [2019-11-23 21:11:00,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:00,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323027144] [2019-11-23 21:11:00,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 243 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-23 21:11:01,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323027144] [2019-11-23 21:11:01,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637051640] [2019-11-23 21:11:01,019 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 21:11:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:01,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 21:11:01,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-23 21:11:01,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:11:01,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:11:01,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123092162] [2019-11-23 21:11:01,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:11:01,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:01,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:11:01,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:11:01,333 INFO L87 Difference]: Start difference. First operand 2674 states and 3515 transitions. Second operand 4 states. [2019-11-23 21:11:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:02,335 INFO L93 Difference]: Finished difference Result 5404 states and 7116 transitions. [2019-11-23 21:11:02,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:11:02,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 302 [2019-11-23 21:11:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:02,352 INFO L225 Difference]: With dead ends: 5404 [2019-11-23 21:11:02,352 INFO L226 Difference]: Without dead ends: 2852 [2019-11-23 21:11:02,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 301 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 21:11:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2019-11-23 21:11:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2674. [2019-11-23 21:11:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2019-11-23 21:11:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3025 transitions. [2019-11-23 21:11:02,415 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3025 transitions. Word has length 302 [2019-11-23 21:11:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:02,415 INFO L462 AbstractCegarLoop]: Abstraction has 2674 states and 3025 transitions. [2019-11-23 21:11:02,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:11:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3025 transitions. [2019-11-23 21:11:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-11-23 21:11:02,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:02,422 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 21:11:02,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:02,628 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1429762887, now seen corresponding path program 1 times [2019-11-23 21:11:02,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:02,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109296909] [2019-11-23 21:11:02,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 323 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 21:11:03,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109296909] [2019-11-23 21:11:03,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98062846] [2019-11-23 21:11:03,150 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 21:11:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:03,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 21:11:03,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:03,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 304 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 21:11:03,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:11:03,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 21:11:03,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583736544] [2019-11-23 21:11:03,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:11:03,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:11:03,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:11:03,533 INFO L87 Difference]: Start difference. First operand 2674 states and 3025 transitions. Second operand 8 states. [2019-11-23 21:11:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:05,587 INFO L93 Difference]: Finished difference Result 5566 states and 6281 transitions. [2019-11-23 21:11:05,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 21:11:05,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 349 [2019-11-23 21:11:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:05,602 INFO L225 Difference]: With dead ends: 5566 [2019-11-23 21:11:05,603 INFO L226 Difference]: Without dead ends: 3072 [2019-11-23 21:11:05,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:11:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2019-11-23 21:11:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2674. [2019-11-23 21:11:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2019-11-23 21:11:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3020 transitions. [2019-11-23 21:11:05,666 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3020 transitions. Word has length 349 [2019-11-23 21:11:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:05,667 INFO L462 AbstractCegarLoop]: Abstraction has 2674 states and 3020 transitions. [2019-11-23 21:11:05,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 21:11:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3020 transitions. [2019-11-23 21:11:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2019-11-23 21:11:05,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:05,681 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-11-23 21:11:05,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:05,894 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1798273979, now seen corresponding path program 1 times [2019-11-23 21:11:05,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:05,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886899374] [2019-11-23 21:11:05,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 769 proven. 0 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-11-23 21:11:07,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886899374] [2019-11-23 21:11:07,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:11:07,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-23 21:11:07,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349621358] [2019-11-23 21:11:07,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:11:07,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:11:07,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:11:07,077 INFO L87 Difference]: Start difference. First operand 2674 states and 3020 transitions. Second operand 8 states. [2019-11-23 21:11:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:08,627 INFO L93 Difference]: Finished difference Result 5174 states and 5865 transitions. [2019-11-23 21:11:08,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:11:08,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 567 [2019-11-23 21:11:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:08,640 INFO L225 Difference]: With dead ends: 5174 [2019-11-23 21:11:08,640 INFO L226 Difference]: Without dead ends: 2680 [2019-11-23 21:11:08,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:11:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2019-11-23 21:11:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2674. [2019-11-23 21:11:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2019-11-23 21:11:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3012 transitions. [2019-11-23 21:11:08,697 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3012 transitions. Word has length 567 [2019-11-23 21:11:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:08,698 INFO L462 AbstractCegarLoop]: Abstraction has 2674 states and 3012 transitions. [2019-11-23 21:11:08,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 21:11:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3012 transitions. [2019-11-23 21:11:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2019-11-23 21:11:08,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:08,715 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-11-23 21:11:08,715 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:08,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1994977414, now seen corresponding path program 1 times [2019-11-23 21:11:08,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:08,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153308741] [2019-11-23 21:11:08,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 543 proven. 260 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2019-11-23 21:11:09,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153308741] [2019-11-23 21:11:09,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147873894] [2019-11-23 21:11:09,657 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 21:11:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:09,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:11:09,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2019-11-23 21:11:10,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:11:10,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:11:10,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623552455] [2019-11-23 21:11:10,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:11:10,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:11:10,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:11:10,123 INFO L87 Difference]: Start difference. First operand 2674 states and 3012 transitions. Second operand 4 states. [2019-11-23 21:11:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:10,985 INFO L93 Difference]: Finished difference Result 6770 states and 7740 transitions. [2019-11-23 21:11:10,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:11:10,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 593 [2019-11-23 21:11:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:11,003 INFO L225 Difference]: With dead ends: 6770 [2019-11-23 21:11:11,003 INFO L226 Difference]: Without dead ends: 4276 [2019-11-23 21:11:11,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 591 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:11:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2019-11-23 21:11:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 4276. [2019-11-23 21:11:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4276 states. [2019-11-23 21:11:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 4670 transitions. [2019-11-23 21:11:11,073 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 4670 transitions. Word has length 593 [2019-11-23 21:11:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:11,075 INFO L462 AbstractCegarLoop]: Abstraction has 4276 states and 4670 transitions. [2019-11-23 21:11:11,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:11:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 4670 transitions. [2019-11-23 21:11:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2019-11-23 21:11:11,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:11,095 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:11:11,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:11,299 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:11,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1713531829, now seen corresponding path program 1 times [2019-11-23 21:11:11,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:11,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100718617] [2019-11-23 21:11:11,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 857 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-11-23 21:11:12,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100718617] [2019-11-23 21:11:12,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284186948] [2019-11-23 21:11:12,069 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 21:11:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:12,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:11:12,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 857 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-11-23 21:11:12,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:11:12,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-11-23 21:11:12,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650903806] [2019-11-23 21:11:12,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:11:12,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:12,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:11:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:12,435 INFO L87 Difference]: Start difference. First operand 4276 states and 4670 transitions. Second operand 5 states. [2019-11-23 21:11:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:13,985 INFO L93 Difference]: Finished difference Result 10688 states and 11721 transitions. [2019-11-23 21:11:13,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:11:13,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 634 [2019-11-23 21:11:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:14,021 INFO L225 Difference]: With dead ends: 10688 [2019-11-23 21:11:14,021 INFO L226 Difference]: Without dead ends: 6592 [2019-11-23 21:11:14,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6592 states. [2019-11-23 21:11:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6592 to 5344. [2019-11-23 21:11:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2019-11-23 21:11:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5832 transitions. [2019-11-23 21:11:14,187 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5832 transitions. Word has length 634 [2019-11-23 21:11:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:14,188 INFO L462 AbstractCegarLoop]: Abstraction has 5344 states and 5832 transitions. [2019-11-23 21:11:14,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:11:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5832 transitions. [2019-11-23 21:11:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2019-11-23 21:11:14,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:14,205 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 21:11:14,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:14,410 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:14,411 INFO L82 PathProgramCache]: Analyzing trace with hash 223844596, now seen corresponding path program 1 times [2019-11-23 21:11:14,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:14,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118437489] [2019-11-23 21:11:14,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 1060 proven. 260 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 21:11:15,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118437489] [2019-11-23 21:11:15,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747691986] [2019-11-23 21:11:15,920 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 21:11:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:16,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:11:16,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 1111 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2019-11-23 21:11:16,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:11:16,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2019-11-23 21:11:16,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413816351] [2019-11-23 21:11:16,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:11:16,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:11:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:11:16,466 INFO L87 Difference]: Start difference. First operand 5344 states and 5832 transitions. Second operand 3 states. [2019-11-23 21:11:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:17,076 INFO L93 Difference]: Finished difference Result 11220 states and 12246 transitions. [2019-11-23 21:11:17,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:17,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 644 [2019-11-23 21:11:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:17,097 INFO L225 Difference]: With dead ends: 11220 [2019-11-23 21:11:17,097 INFO L226 Difference]: Without dead ends: 6056 [2019-11-23 21:11:17,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 644 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:11:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2019-11-23 21:11:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 5700. [2019-11-23 21:11:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5700 states. [2019-11-23 21:11:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 6183 transitions. [2019-11-23 21:11:17,192 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 6183 transitions. Word has length 644 [2019-11-23 21:11:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:17,193 INFO L462 AbstractCegarLoop]: Abstraction has 5700 states and 6183 transitions. [2019-11-23 21:11:17,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 6183 transitions. [2019-11-23 21:11:17,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2019-11-23 21:11:17,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:17,203 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:11:17,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:17,407 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:17,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1244517444, now seen corresponding path program 1 times [2019-11-23 21:11:17,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:17,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173672371] [2019-11-23 21:11:17,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 1036 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2019-11-23 21:11:18,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173672371] [2019-11-23 21:11:18,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:11:18,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:11:18,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691072721] [2019-11-23 21:11:18,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:11:18,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:18,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:11:18,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:11:18,377 INFO L87 Difference]: Start difference. First operand 5700 states and 6183 transitions. Second operand 4 states. [2019-11-23 21:11:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:19,327 INFO L93 Difference]: Finished difference Result 11932 states and 12993 transitions. [2019-11-23 21:11:19,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:11:19,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 751 [2019-11-23 21:11:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:19,359 INFO L225 Difference]: With dead ends: 11932 [2019-11-23 21:11:19,360 INFO L226 Difference]: Without dead ends: 6412 [2019-11-23 21:11:19,366 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 21:11:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2019-11-23 21:11:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 5344. [2019-11-23 21:11:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2019-11-23 21:11:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5717 transitions. [2019-11-23 21:11:19,437 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5717 transitions. Word has length 751 [2019-11-23 21:11:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:19,438 INFO L462 AbstractCegarLoop]: Abstraction has 5344 states and 5717 transitions. [2019-11-23 21:11:19,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:11:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5717 transitions. [2019-11-23 21:11:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2019-11-23 21:11:19,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:19,448 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:11:19,449 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1327784350, now seen corresponding path program 1 times [2019-11-23 21:11:19,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:19,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405064084] [2019-11-23 21:11:19,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 1166 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2019-11-23 21:11:20,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405064084] [2019-11-23 21:11:20,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707200380] [2019-11-23 21:11:20,360 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 21:11:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:20,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 21:11:20,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:20,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:20,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:20,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:20,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:20,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:20,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 1302 proven. 489 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-23 21:11:21,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:11:21,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-23 21:11:21,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325414938] [2019-11-23 21:11:21,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:11:21,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:11:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:11:21,616 INFO L87 Difference]: Start difference. First operand 5344 states and 5717 transitions. Second operand 8 states. [2019-11-23 21:11:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:24,124 INFO L93 Difference]: Finished difference Result 13180 states and 14130 transitions. [2019-11-23 21:11:24,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 21:11:24,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 801 [2019-11-23 21:11:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:24,141 INFO L225 Difference]: With dead ends: 13180 [2019-11-23 21:11:24,141 INFO L226 Difference]: Without dead ends: 8016 [2019-11-23 21:11:24,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 801 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:11:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2019-11-23 21:11:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 7302. [2019-11-23 21:11:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7302 states. [2019-11-23 21:11:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 7758 transitions. [2019-11-23 21:11:24,246 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 7758 transitions. Word has length 801 [2019-11-23 21:11:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:24,247 INFO L462 AbstractCegarLoop]: Abstraction has 7302 states and 7758 transitions. [2019-11-23 21:11:24,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 21:11:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 7758 transitions. [2019-11-23 21:11:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2019-11-23 21:11:24,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:24,256 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, 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, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 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, 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 21:11:24,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:24,464 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash 776024818, now seen corresponding path program 1 times [2019-11-23 21:11:24,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:24,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133319903] [2019-11-23 21:11:24,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 563 proven. 234 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2019-11-23 21:11:26,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133319903] [2019-11-23 21:11:26,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538033430] [2019-11-23 21:11:26,205 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 21:11:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:26,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:11:26,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 797 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2019-11-23 21:11:26,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:11:26,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2019-11-23 21:11:26,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018187552] [2019-11-23 21:11:26,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:11:26,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:11:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:11:26,735 INFO L87 Difference]: Start difference. First operand 7302 states and 7758 transitions. Second operand 3 states. [2019-11-23 21:11:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:27,432 INFO L93 Difference]: Finished difference Result 14780 states and 15738 transitions. [2019-11-23 21:11:27,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:27,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 803 [2019-11-23 21:11:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:27,446 INFO L225 Difference]: With dead ends: 14780 [2019-11-23 21:11:27,446 INFO L226 Difference]: Without dead ends: 7658 [2019-11-23 21:11:27,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 804 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:11:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7658 states. [2019-11-23 21:11:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7658 to 6946. [2019-11-23 21:11:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6946 states. [2019-11-23 21:11:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 7369 transitions. [2019-11-23 21:11:27,545 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 7369 transitions. Word has length 803 [2019-11-23 21:11:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:27,545 INFO L462 AbstractCegarLoop]: Abstraction has 6946 states and 7369 transitions. [2019-11-23 21:11:27,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 7369 transitions. [2019-11-23 21:11:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2019-11-23 21:11:27,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:27,557 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 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, 5, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:11:27,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:27,761 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1446623235, now seen corresponding path program 1 times [2019-11-23 21:11:27,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:27,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434409403] [2019-11-23 21:11:27,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2464 backedges. 219 proven. 1018 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2019-11-23 21:11:29,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434409403] [2019-11-23 21:11:29,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810035422] [2019-11-23 21:11:29,402 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 21:11:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:29,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 21:11:29,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:29,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:29,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,079 WARN L192 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 29 [2019-11-23 21:11:31,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:31,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:11:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2464 backedges. 629 proven. 720 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2019-11-23 21:11:32,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:11:32,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-11-23 21:11:32,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020727488] [2019-11-23 21:11:32,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 21:11:32,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:32,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 21:11:32,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-11-23 21:11:32,986 INFO L87 Difference]: Start difference. First operand 6946 states and 7369 transitions. Second operand 16 states. [2019-11-23 21:11:34,296 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-23 21:11:34,619 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 32