/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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:22:49,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:22:49,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:22:49,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:22:49,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:22:49,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:22:49,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:22:49,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:22:49,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:22:49,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:22:49,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:22:49,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:22:49,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:22:49,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:22:49,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:22:49,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:22:49,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:22:49,186 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 21:22:49,202 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:22:49,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:22:49,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:22:49,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:22:49,203 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:22:49,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:22:49,204 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:22:49,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:22:49,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:22:49,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:22:49,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:22:49,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:22:49,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:22:49,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:22:49,205 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:22:49,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:22:49,206 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:22:49,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:22:49,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:22:49,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:22:49,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:22:49,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:22:49,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:22:49,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:22:49,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:22:49,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:22:49,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:22:49,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:22:49,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:22:49,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:22:49,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:22:49,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:22:49,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:22:49,502 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:22:49,503 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:22:49,504 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-11-23 21:22:49,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af091cafa/9272344d58774ab4b89ca1110d730c03/FLAG9e9a09612 [2019-11-23 21:22:50,319 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:22:50,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-11-23 21:22:50,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af091cafa/9272344d58774ab4b89ca1110d730c03/FLAG9e9a09612 [2019-11-23 21:22:50,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af091cafa/9272344d58774ab4b89ca1110d730c03 [2019-11-23 21:22:50,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:22:50,428 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:22:50,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:50,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:22:50,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:22:50,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:50" (1/1) ... [2019-11-23 21:22:50,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb6ee21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:50, skipping insertion in model container [2019-11-23 21:22:50,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:50" (1/1) ... [2019-11-23 21:22:50,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:22:50,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:22:51,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:51,796 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:22:52,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:52,310 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:22:52,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52 WrapperNode [2019-11-23 21:22:52,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:52,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:52,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:22:52,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:22:52,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:52,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:22:52,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:22:52,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:22:52,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (1/1) ... [2019-11-23 21:22:52,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:22:52,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:22:52,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:22:52,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:22:52,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (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 21:22:52,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:22:52,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:22:56,666 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:22:56,666 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:22:56,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:56 BoogieIcfgContainer [2019-11-23 21:22:56,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:22:56,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:22:56,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:22:56,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:22:56,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:50" (1/3) ... [2019-11-23 21:22:56,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49df95cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:56, skipping insertion in model container [2019-11-23 21:22:56,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:52" (2/3) ... [2019-11-23 21:22:56,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49df95cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:56, skipping insertion in model container [2019-11-23 21:22:56,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:56" (3/3) ... [2019-11-23 21:22:56,677 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label22.c [2019-11-23 21:22:56,686 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:22:56,695 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:22:56,706 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:22:56,741 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:22:56,741 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:22:56,741 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:22:56,742 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:22:56,742 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:22:56,742 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:22:56,742 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:22:56,742 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:22:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:22:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 21:22:56,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:56,779 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] [2019-11-23 21:22:56,780 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash 751578873, now seen corresponding path program 1 times [2019-11-23 21:22:56,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:56,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95536936] [2019-11-23 21:22:56,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:57,177 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 21:22:57,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95536936] [2019-11-23 21:22:57,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:57,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:22:57,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678618616] [2019-11-23 21:22:57,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:57,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:57,204 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:04,783 INFO L93 Difference]: Finished difference Result 2910 states and 5661 transitions. [2019-11-23 21:23:04,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:23:04,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-23 21:23:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:04,837 INFO L225 Difference]: With dead ends: 2910 [2019-11-23 21:23:04,837 INFO L226 Difference]: Without dead ends: 2080 [2019-11-23 21:23:04,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2019-11-23 21:23:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2074. [2019-11-23 21:23:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:23:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3226 transitions. [2019-11-23 21:23:05,044 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3226 transitions. Word has length 41 [2019-11-23 21:23:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:05,045 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3226 transitions. [2019-11-23 21:23:05,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3226 transitions. [2019-11-23 21:23:05,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-23 21:23:05,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:05,068 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:05,073 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash 324125752, now seen corresponding path program 1 times [2019-11-23 21:23:05,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:05,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879846883] [2019-11-23 21:23:05,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-23 21:23:05,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879846883] [2019-11-23 21:23:05,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:05,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:05,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302181929] [2019-11-23 21:23:05,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:05,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:05,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:05,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:05,652 INFO L87 Difference]: Start difference. First operand 2074 states and 3226 transitions. Second operand 5 states. [2019-11-23 21:23:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:12,378 INFO L93 Difference]: Finished difference Result 6216 states and 9564 transitions. [2019-11-23 21:23:12,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:12,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 201 [2019-11-23 21:23:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:12,405 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:23:12,406 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:23:12,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:23:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:23:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:23:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5440 transitions. [2019-11-23 21:23:12,487 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5440 transitions. Word has length 201 [2019-11-23 21:23:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:12,488 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5440 transitions. [2019-11-23 21:23:12,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:23:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5440 transitions. [2019-11-23 21:23:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-11-23 21:23:12,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:12,491 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, 2, 2, 2, 2, 2, 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] [2019-11-23 21:23:12,492 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1800310103, now seen corresponding path program 1 times [2019-11-23 21:23:12,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:12,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671927814] [2019-11-23 21:23:12,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 21:23:12,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671927814] [2019-11-23 21:23:12,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588130442] [2019-11-23 21:23:12,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:12,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:12,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:13,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:13,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:23:13,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345757842] [2019-11-23 21:23:13,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:13,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:13,032 INFO L87 Difference]: Start difference. First operand 4144 states and 5440 transitions. Second operand 3 states. [2019-11-23 21:23:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:16,857 INFO L93 Difference]: Finished difference Result 9666 states and 13519 transitions. [2019-11-23 21:23:16,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:16,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 290 [2019-11-23 21:23:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:16,887 INFO L225 Difference]: With dead ends: 9666 [2019-11-23 21:23:16,887 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:23:16,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:23:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:23:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:23:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 7931 transitions. [2019-11-23 21:23:16,996 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 7931 transitions. Word has length 290 [2019-11-23 21:23:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:16,997 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 7931 transitions. [2019-11-23 21:23:16,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 7931 transitions. [2019-11-23 21:23:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2019-11-23 21:23:17,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:17,003 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:17,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:17,207 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:17,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1987191427, now seen corresponding path program 1 times [2019-11-23 21:23:17,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:17,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710874834] [2019-11-23 21:23:17,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 163 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:17,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710874834] [2019-11-23 21:23:17,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142095864] [2019-11-23 21:23:17,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:17,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:17,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-23 21:23:17,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:17,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2019-11-23 21:23:17,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371382002] [2019-11-23 21:23:17,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:17,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:17,867 INFO L87 Difference]: Start difference. First operand 6214 states and 7931 transitions. Second operand 3 states. [2019-11-23 21:23:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:21,252 INFO L93 Difference]: Finished difference Result 15186 states and 20097 transitions. [2019-11-23 21:23:21,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:21,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 313 [2019-11-23 21:23:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:21,288 INFO L225 Difference]: With dead ends: 15186 [2019-11-23 21:23:21,288 INFO L226 Difference]: Without dead ends: 9664 [2019-11-23 21:23:21,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2019-11-23 21:23:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2019-11-23 21:23:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:23:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10980 transitions. [2019-11-23 21:23:21,450 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10980 transitions. Word has length 313 [2019-11-23 21:23:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:21,451 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 10980 transitions. [2019-11-23 21:23:21,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10980 transitions. [2019-11-23 21:23:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2019-11-23 21:23:21,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:21,465 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:21,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:21,678 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash 852106779, now seen corresponding path program 1 times [2019-11-23 21:23:21,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:21,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101421893] [2019-11-23 21:23:21,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 331 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 21:23:22,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101421893] [2019-11-23 21:23:22,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073786047] [2019-11-23 21:23:22,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:22,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:22,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:23:22,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:22,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:22,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41770003] [2019-11-23 21:23:22,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:22,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:22,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:22,735 INFO L87 Difference]: Start difference. First operand 8974 states and 10980 transitions. Second operand 3 states. [2019-11-23 21:23:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:26,541 INFO L93 Difference]: Finished difference Result 24846 states and 30841 transitions. [2019-11-23 21:23:26,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:26,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 431 [2019-11-23 21:23:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:26,593 INFO L225 Difference]: With dead ends: 24846 [2019-11-23 21:23:26,593 INFO L226 Difference]: Without dead ends: 16564 [2019-11-23 21:23:26,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2019-11-23 21:23:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 15184. [2019-11-23 21:23:26,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15184 states. [2019-11-23 21:23:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15184 states to 15184 states and 18696 transitions. [2019-11-23 21:23:26,896 INFO L78 Accepts]: Start accepts. Automaton has 15184 states and 18696 transitions. Word has length 431 [2019-11-23 21:23:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:26,897 INFO L462 AbstractCegarLoop]: Abstraction has 15184 states and 18696 transitions. [2019-11-23 21:23:26,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 15184 states and 18696 transitions. [2019-11-23 21:23:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2019-11-23 21:23:26,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:26,921 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, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:27,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:27,135 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1522505253, now seen corresponding path program 1 times [2019-11-23 21:23:27,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:27,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610810398] [2019-11-23 21:23:27,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 441 proven. 3 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2019-11-23 21:23:28,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610810398] [2019-11-23 21:23:28,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426458170] [2019-11-23 21:23:28,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:28,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:28,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 21:23:28,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:28,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:28,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597668702] [2019-11-23 21:23:28,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:28,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:28,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:28,351 INFO L87 Difference]: Start difference. First operand 15184 states and 18696 transitions. Second operand 3 states. [2019-11-23 21:23:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:32,296 INFO L93 Difference]: Finished difference Result 36576 states and 46512 transitions. [2019-11-23 21:23:32,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:32,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2019-11-23 21:23:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:32,337 INFO L225 Difference]: With dead ends: 36576 [2019-11-23 21:23:32,337 INFO L226 Difference]: Without dead ends: 22084 [2019-11-23 21:23:32,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 490 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2019-11-23 21:23:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 22084. [2019-11-23 21:23:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22084 states. [2019-11-23 21:23:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 27572 transitions. [2019-11-23 21:23:32,666 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 27572 transitions. Word has length 491 [2019-11-23 21:23:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:32,667 INFO L462 AbstractCegarLoop]: Abstraction has 22084 states and 27572 transitions. [2019-11-23 21:23:32,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 27572 transitions. [2019-11-23 21:23:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2019-11-23 21:23:32,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:32,682 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:32,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:32,886 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:32,886 INFO L82 PathProgramCache]: Analyzing trace with hash 166670385, now seen corresponding path program 1 times [2019-11-23 21:23:32,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:32,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018437830] [2019-11-23 21:23:32,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 509 proven. 3 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-11-23 21:23:33,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018437830] [2019-11-23 21:23:33,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143724854] [2019-11-23 21:23:33,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:33,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:33,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2019-11-23 21:23:33,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:33,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:33,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302087691] [2019-11-23 21:23:33,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:33,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:33,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:33,859 INFO L87 Difference]: Start difference. First operand 22084 states and 27572 transitions. Second operand 3 states. [2019-11-23 21:23:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:37,383 INFO L93 Difference]: Finished difference Result 43476 states and 54446 transitions. [2019-11-23 21:23:37,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:37,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 559 [2019-11-23 21:23:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:37,422 INFO L225 Difference]: With dead ends: 43476 [2019-11-23 21:23:37,422 INFO L226 Difference]: Without dead ends: 22084 [2019-11-23 21:23:37,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 558 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2019-11-23 21:23:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 21394. [2019-11-23 21:23:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21394 states. [2019-11-23 21:23:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21394 states to 21394 states and 24852 transitions. [2019-11-23 21:23:37,779 INFO L78 Accepts]: Start accepts. Automaton has 21394 states and 24852 transitions. Word has length 559 [2019-11-23 21:23:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:37,780 INFO L462 AbstractCegarLoop]: Abstraction has 21394 states and 24852 transitions. [2019-11-23 21:23:37,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 21394 states and 24852 transitions. [2019-11-23 21:23:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2019-11-23 21:23:37,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:37,805 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:38,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:38,010 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1554145769, now seen corresponding path program 1 times [2019-11-23 21:23:38,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:38,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553129170] [2019-11-23 21:23:38,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 539 proven. 3 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2019-11-23 21:23:38,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553129170] [2019-11-23 21:23:38,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157732734] [2019-11-23 21:23:38,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:38,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:38,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2019-11-23 21:23:39,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:39,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:39,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118697553] [2019-11-23 21:23:39,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:39,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:39,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:39,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:39,319 INFO L87 Difference]: Start difference. First operand 21394 states and 24852 transitions. Second operand 3 states. [2019-11-23 21:23:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:43,322 INFO L93 Difference]: Finished difference Result 51756 states and 60511 transitions. [2019-11-23 21:23:43,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:43,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 589 [2019-11-23 21:23:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:43,359 INFO L225 Difference]: With dead ends: 51756 [2019-11-23 21:23:43,359 INFO L226 Difference]: Without dead ends: 31054 [2019-11-23 21:23:43,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 588 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31054 states. [2019-11-23 21:23:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31054 to 29674. [2019-11-23 21:23:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29674 states. [2019-11-23 21:23:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29674 states to 29674 states and 33864 transitions. [2019-11-23 21:23:43,829 INFO L78 Accepts]: Start accepts. Automaton has 29674 states and 33864 transitions. Word has length 589 [2019-11-23 21:23:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:43,830 INFO L462 AbstractCegarLoop]: Abstraction has 29674 states and 33864 transitions. [2019-11-23 21:23:43,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29674 states and 33864 transitions. [2019-11-23 21:23:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2019-11-23 21:23:43,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:43,844 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:44,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:44,048 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash -856536689, now seen corresponding path program 1 times [2019-11-23 21:23:44,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:44,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612462031] [2019-11-23 21:23:44,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 563 proven. 3 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2019-11-23 21:23:44,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612462031] [2019-11-23 21:23:44,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137913366] [2019-11-23 21:23:44,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:44,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:44,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 21:23:45,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:45,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:45,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911144504] [2019-11-23 21:23:45,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:45,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:45,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:45,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:45,096 INFO L87 Difference]: Start difference. First operand 29674 states and 33864 transitions. Second operand 3 states. [2019-11-23 21:23:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:48,478 INFO L93 Difference]: Finished difference Result 59346 states and 67732 transitions. [2019-11-23 21:23:48,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:48,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 637 [2019-11-23 21:23:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:48,507 INFO L225 Difference]: With dead ends: 59346 [2019-11-23 21:23:48,507 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:23:48,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 636 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:23:48,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 28294. [2019-11-23 21:23:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28294 states. [2019-11-23 21:23:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28294 states to 28294 states and 32262 transitions. [2019-11-23 21:23:48,945 INFO L78 Accepts]: Start accepts. Automaton has 28294 states and 32262 transitions. Word has length 637 [2019-11-23 21:23:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:48,946 INFO L462 AbstractCegarLoop]: Abstraction has 28294 states and 32262 transitions. [2019-11-23 21:23:48,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28294 states and 32262 transitions. [2019-11-23 21:23:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2019-11-23 21:23:48,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:48,962 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, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:49,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:49,167 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2050496483, now seen corresponding path program 1 times [2019-11-23 21:23:49,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:49,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373864516] [2019-11-23 21:23:49,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 733 proven. 3 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2019-11-23 21:23:49,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373864516] [2019-11-23 21:23:49,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935861216] [2019-11-23 21:23:49,765 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 21:23:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:49,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:49,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 932 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 21:23:50,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:50,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:50,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136166126] [2019-11-23 21:23:50,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:50,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:50,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:50,248 INFO L87 Difference]: Start difference. First operand 28294 states and 32262 transitions. Second operand 3 states. [2019-11-23 21:23:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:53,726 INFO L93 Difference]: Finished difference Result 62106 states and 71092 transitions. [2019-11-23 21:23:53,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:53,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 683 [2019-11-23 21:23:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:53,756 INFO L225 Difference]: With dead ends: 62106 [2019-11-23 21:23:53,757 INFO L226 Difference]: Without dead ends: 34504 [2019-11-23 21:23:53,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34504 states. [2019-11-23 21:23:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34504 to 34504. [2019-11-23 21:23:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34504 states. [2019-11-23 21:23:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 38856 transitions. [2019-11-23 21:23:54,285 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 38856 transitions. Word has length 683 [2019-11-23 21:23:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:54,286 INFO L462 AbstractCegarLoop]: Abstraction has 34504 states and 38856 transitions. [2019-11-23 21:23:54,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 38856 transitions. [2019-11-23 21:23:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2019-11-23 21:23:54,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:54,314 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:54,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:54,520 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:54,521 INFO L82 PathProgramCache]: Analyzing trace with hash -316922828, now seen corresponding path program 1 times [2019-11-23 21:23:54,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:54,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761282854] [2019-11-23 21:23:54,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 563 proven. 3 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2019-11-23 21:23:55,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761282854] [2019-11-23 21:23:55,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657135498] [2019-11-23 21:23:55,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:55,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:55,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 684 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 21:23:55,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:55,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:55,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49690322] [2019-11-23 21:23:55,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:55,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:55,667 INFO L87 Difference]: Start difference. First operand 34504 states and 38856 transitions. Second operand 3 states. [2019-11-23 21:23:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:59,320 INFO L93 Difference]: Finished difference Result 77976 states and 88174 transitions. [2019-11-23 21:23:59,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:59,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 704 [2019-11-23 21:23:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:59,361 INFO L225 Difference]: With dead ends: 77976 [2019-11-23 21:23:59,361 INFO L226 Difference]: Without dead ends: 44164 [2019-11-23 21:23:59,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 703 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44164 states. [2019-11-23 21:23:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44164 to 42784. [2019-11-23 21:23:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42784 states. [2019-11-23 21:23:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 47892 transitions. [2019-11-23 21:23:59,687 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 47892 transitions. Word has length 704 [2019-11-23 21:23:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:59,688 INFO L462 AbstractCegarLoop]: Abstraction has 42784 states and 47892 transitions. [2019-11-23 21:23:59,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 47892 transitions. [2019-11-23 21:23:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2019-11-23 21:23:59,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:59,703 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:59,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:59,905 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash -487443743, now seen corresponding path program 1 times [2019-11-23 21:23:59,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:59,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249226766] [2019-11-23 21:23:59,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 707 proven. 3 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 21:24:00,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249226766] [2019-11-23 21:24:00,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999892776] [2019-11-23 21:24:00,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:01,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:01,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-11-23 21:24:01,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:01,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:01,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993316560] [2019-11-23 21:24:01,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:01,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:01,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:01,414 INFO L87 Difference]: Start difference. First operand 42784 states and 47892 transitions. Second operand 3 states. [2019-11-23 21:24:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:04,985 INFO L93 Difference]: Finished difference Result 94536 states and 106126 transitions. [2019-11-23 21:24:04,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:04,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 727 [2019-11-23 21:24:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:05,021 INFO L225 Difference]: With dead ends: 94536 [2019-11-23 21:24:05,022 INFO L226 Difference]: Without dead ends: 47614 [2019-11-23 21:24:05,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 726 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47614 states. [2019-11-23 21:24:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47614 to 46234. [2019-11-23 21:24:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46234 states. [2019-11-23 21:24:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 48245 transitions. [2019-11-23 21:24:05,351 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 48245 transitions. Word has length 727 [2019-11-23 21:24:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:05,351 INFO L462 AbstractCegarLoop]: Abstraction has 46234 states and 48245 transitions. [2019-11-23 21:24:05,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 48245 transitions. [2019-11-23 21:24:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2019-11-23 21:24:05,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:05,378 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, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 21:24:05,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:05,582 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1477363806, now seen corresponding path program 1 times [2019-11-23 21:24:05,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:05,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993543981] [2019-11-23 21:24:05,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat