/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/array-examples/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:18:52,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:18:52,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:18:52,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:18:52,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:18:52,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:18:52,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:18:52,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:18:52,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:18:52,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:18:52,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:18:52,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:18:52,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:18:52,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:18:52,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:18:52,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:18:52,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:18:52,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:18:52,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:18:52,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:18:52,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:18:52,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:18:52,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:18:52,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:18:52,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:18:52,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:18:52,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:18:52,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:18:52,799 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 20:18:52,835 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:18:52,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:18:52,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:18:52,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:18:52,842 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:18:52,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:18:52,843 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:18:52,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:18:52,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:18:52,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:18:52,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:18:52,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:18:52,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:18:52,844 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:18:52,844 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:18:52,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:18:52,845 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:18:52,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:18:52,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:18:52,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:18:52,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:18:52,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:18:52,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:52,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:18:52,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:18:52,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:18:52,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:18:52,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:18:52,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:18:52,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:18:53,173 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:18:53,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:18:53,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:18:53,201 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:18:53,202 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:18:53,203 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2019-11-23 20:18:53,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed06dfda0/5d09b15582af40a18bb0b1e935dfdd8d/FLAG2521a373d [2019-11-23 20:18:53,706 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:18:53,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2019-11-23 20:18:53,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed06dfda0/5d09b15582af40a18bb0b1e935dfdd8d/FLAG2521a373d [2019-11-23 20:18:54,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed06dfda0/5d09b15582af40a18bb0b1e935dfdd8d [2019-11-23 20:18:54,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:18:54,106 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:18:54,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:54,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:18:54,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:18:54,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47757ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54, skipping insertion in model container [2019-11-23 20:18:54,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:18:54,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:18:54,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:54,332 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:18:54,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:54,372 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:18:54,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54 WrapperNode [2019-11-23 20:18:54,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:54,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:54,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:18:54,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:18:54,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:54,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:18:54,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:18:54,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:18:54,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (1/1) ... [2019-11-23 20:18:54,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:18:54,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:18:54,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:18:54,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:18:54,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (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 20:18:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:18:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:18:54,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:18:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:18:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:18:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:18:54,871 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:18:54,871 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:18:54,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:54 BoogieIcfgContainer [2019-11-23 20:18:54,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:18:54,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:18:54,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:18:54,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:18:54,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:18:54" (1/3) ... [2019-11-23 20:18:54,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebc872c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:54, skipping insertion in model container [2019-11-23 20:18:54,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:54" (2/3) ... [2019-11-23 20:18:54,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebc872c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:54, skipping insertion in model container [2019-11-23 20:18:54,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:54" (3/3) ... [2019-11-23 20:18:54,887 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2019-11-23 20:18:54,898 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:18:54,905 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:18:54,916 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:18:54,936 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:18:54,937 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:18:54,937 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:18:54,937 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:18:54,937 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:18:54,937 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:18:54,938 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:18:54,938 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:18:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 20:18:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:18:54,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:54,957 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:54,957 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2019-11-23 20:18:54,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:54,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341874802] [2019-11-23 20:18:54,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,142 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 20:18:55,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341874802] [2019-11-23 20:18:55,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:55,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:55,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175042119] [2019-11-23 20:18:55,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:55,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:55,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:55,172 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 20:18:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:55,211 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2019-11-23 20:18:55,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:55,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:18:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:55,225 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:18:55,225 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:18:55,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:18:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 20:18:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:18:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:18:55,274 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-11-23 20:18:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:55,275 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:18:55,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:18:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:18:55,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:55,278 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:55,279 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2019-11-23 20:18:55,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:55,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672501255] [2019-11-23 20:18:55,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:55,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672501255] [2019-11-23 20:18:55,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:55,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:55,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240122624] [2019-11-23 20:18:55,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:55,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:55,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:55,371 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2019-11-23 20:18:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:55,408 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-11-23 20:18:55,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:55,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:18:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:55,413 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:18:55,413 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:18:55,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:18:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:18:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:18:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-11-23 20:18:55,425 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2019-11-23 20:18:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:55,426 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-23 20:18:55,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-11-23 20:18:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:18:55,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:55,429 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:55,429 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:55,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2019-11-23 20:18:55,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:55,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060933232] [2019-11-23 20:18:55,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:55,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060933232] [2019-11-23 20:18:55,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:55,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:55,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508251580] [2019-11-23 20:18:55,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:55,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:55,489 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2019-11-23 20:18:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:55,523 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2019-11-23 20:18:55,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:55,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 20:18:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:55,525 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:18:55,525 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:18:55,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:18:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 20:18:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:18:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 20:18:55,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2019-11-23 20:18:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:55,532 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 20:18:55,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 20:18:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:18:55,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:55,534 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:55,534 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:55,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2019-11-23 20:18:55,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:55,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468212269] [2019-11-23 20:18:55,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:55,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468212269] [2019-11-23 20:18:55,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666291210] [2019-11-23 20:18:55,597 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 20:18:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:55,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:55,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:55,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:18:55,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113524468] [2019-11-23 20:18:55,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:18:55,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:18:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:55,703 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2019-11-23 20:18:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:55,737 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2019-11-23 20:18:55,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:18:55,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-23 20:18:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:55,740 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:18:55,741 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:18:55,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 20:18:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:18:55,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-23 20:18:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:18:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 20:18:55,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2019-11-23 20:18:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:55,753 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 20:18:55,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:18:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 20:18:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:18:55,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:55,755 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:55,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:55,956 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2019-11-23 20:18:55,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:55,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293476318] [2019-11-23 20:18:55,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:56,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293476318] [2019-11-23 20:18:56,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236051286] [2019-11-23 20:18:56,025 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 20:18:56,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:56,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:56,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:56,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:56,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:56,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:18:56,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216918960] [2019-11-23 20:18:56,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:18:56,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:18:56,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:56,090 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 6 states. [2019-11-23 20:18:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:56,118 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2019-11-23 20:18:56,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:18:56,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:18:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:56,120 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:18:56,120 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:18:56,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:18:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:18:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:18:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:18:56,127 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2019-11-23 20:18:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:56,127 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:18:56,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:18:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:18:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:18:56,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:56,129 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:56,333 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1396986023, now seen corresponding path program 3 times [2019-11-23 20:18:56,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531843543] [2019-11-23 20:18:56,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:56,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531843543] [2019-11-23 20:18:56,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771516173] [2019-11-23 20:18:56,448 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 20:18:56,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:18:56,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:56,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:56,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:56,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:56,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:18:56,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905013916] [2019-11-23 20:18:56,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:56,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:56,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:56,555 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2019-11-23 20:18:56,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:56,638 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2019-11-23 20:18:56,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:18:56,643 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-23 20:18:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:56,644 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:18:56,644 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:18:56,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:18:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-11-23 20:18:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:18:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-11-23 20:18:56,658 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2019-11-23 20:18:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:56,659 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-11-23 20:18:56,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-11-23 20:18:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:18:56,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:56,660 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:56,874 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1870344925, now seen corresponding path program 4 times [2019-11-23 20:18:56,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790776229] [2019-11-23 20:18:56,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:18:56,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790776229] [2019-11-23 20:18:56,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400384373] [2019-11-23 20:18:56,968 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 20:18:57,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:57,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:57,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:57,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:18:57,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:57,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:18:57,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711331768] [2019-11-23 20:18:57,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:57,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:57,038 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 8 states. [2019-11-23 20:18:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,068 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-11-23 20:18:57,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:18:57,069 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-23 20:18:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,070 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:18:57,070 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:18:57,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:18:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 20:18:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:18:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-23 20:18:57,076 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 26 [2019-11-23 20:18:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,077 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-23 20:18:57,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-23 20:18:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:18:57,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,078 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:57,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,282 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash 243034463, now seen corresponding path program 5 times [2019-11-23 20:18:57,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:57,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50489956] [2019-11-23 20:18:57,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:18:57,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50489956] [2019-11-23 20:18:57,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365113102] [2019-11-23 20:18:57,371 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 20:18:57,419 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:18:57,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:57,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:57,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:18:57,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:57,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:18:57,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458215590] [2019-11-23 20:18:57,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:57,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:57,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:57,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:57,470 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 11 states. [2019-11-23 20:18:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,576 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-11-23 20:18:57,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:57,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-23 20:18:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,578 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:18:57,578 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:18:57,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:18:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2019-11-23 20:18:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:18:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2019-11-23 20:18:57,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 28 [2019-11-23 20:18:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,585 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2019-11-23 20:18:57,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2019-11-23 20:18:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:18:57,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,586 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:57,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,787 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1982159585, now seen corresponding path program 6 times [2019-11-23 20:18:57,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:57,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023878001] [2019-11-23 20:18:57,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:18:57,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023878001] [2019-11-23 20:18:57,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201389426] [2019-11-23 20:18:57,869 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 20:18:57,932 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:18:57,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:57,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:57,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:18:58,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:58,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:18:58,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627890543] [2019-11-23 20:18:58,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:18:58,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:18:58,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:58,002 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 13 states. [2019-11-23 20:18:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:58,185 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2019-11-23 20:18:58,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:18:58,186 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-23 20:18:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:58,187 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:18:58,188 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:18:58,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:18:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-11-23 20:18:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:18:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-11-23 20:18:58,204 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 33 [2019-11-23 20:18:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:58,205 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-11-23 20:18:58,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:18:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-11-23 20:18:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:18:58,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:58,209 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:58,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,410 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:58,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1236783971, now seen corresponding path program 7 times [2019-11-23 20:18:58,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:58,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269024387] [2019-11-23 20:18:58,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:18:58,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269024387] [2019-11-23 20:18:58,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730328485] [2019-11-23 20:18:58,561 INFO L92 rtionOrderModulation]: Changing assertion order to 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 20:18:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:58,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:18:58,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:18:58,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:58,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:18:58,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629801752] [2019-11-23 20:18:58,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:58,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:58,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:58,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:58,632 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 11 states. [2019-11-23 20:18:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:58,674 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-11-23 20:18:58,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:18:58,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-11-23 20:18:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:58,676 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:18:58,676 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:18:58,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:58,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:18:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 20:18:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:18:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2019-11-23 20:18:58,689 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 38 [2019-11-23 20:18:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:58,689 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2019-11-23 20:18:58,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2019-11-23 20:18:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:18:58,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:58,691 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:58,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,902 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash 824268517, now seen corresponding path program 8 times [2019-11-23 20:18:58,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:58,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002782822] [2019-11-23 20:18:58,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:18:59,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002782822] [2019-11-23 20:18:59,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998700917] [2019-11-23 20:18:59,032 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 20:18:59,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:59,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:59,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:59,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:18:59,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:59,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:18:59,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326291114] [2019-11-23 20:18:59,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:59,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:59,121 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 12 states. [2019-11-23 20:18:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:59,167 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2019-11-23 20:18:59,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:59,168 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2019-11-23 20:18:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:59,169 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:18:59,169 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:18:59,170 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:18:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 20:18:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:18:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2019-11-23 20:18:59,175 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 40 [2019-11-23 20:18:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:59,175 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2019-11-23 20:18:59,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2019-11-23 20:18:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:18:59,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:59,177 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:59,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,387 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:59,388 INFO L82 PathProgramCache]: Analyzing trace with hash -466091545, now seen corresponding path program 9 times [2019-11-23 20:18:59,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:59,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067359429] [2019-11-23 20:18:59,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:18:59,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067359429] [2019-11-23 20:18:59,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549434803] [2019-11-23 20:18:59,545 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 20:18:59,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:18:59,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:59,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:59,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:18:59,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:59,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:18:59,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639164612] [2019-11-23 20:18:59,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:18:59,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:59,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:18:59,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:18:59,664 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 17 states. [2019-11-23 20:18:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:59,773 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2019-11-23 20:18:59,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:18:59,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2019-11-23 20:18:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:59,775 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:18:59,775 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:18:59,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:18:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:18:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2019-11-23 20:18:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:18:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2019-11-23 20:18:59,782 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 42 [2019-11-23 20:18:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:59,782 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2019-11-23 20:18:59,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:18:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2019-11-23 20:18:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:18:59,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:59,783 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:59,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,989 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash -981471015, now seen corresponding path program 10 times [2019-11-23 20:18:59,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:59,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734183243] [2019-11-23 20:18:59,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:19:00,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734183243] [2019-11-23 20:19:00,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002691478] [2019-11-23 20:19:00,113 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 20:19:00,158 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:00,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:00,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:19:00,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:19:00,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:00,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:19:00,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624382422] [2019-11-23 20:19:00,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:19:00,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:19:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:19:00,190 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 14 states. [2019-11-23 20:19:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:00,236 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2019-11-23 20:19:00,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:19:00,237 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2019-11-23 20:19:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:00,237 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:19:00,237 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:19:00,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:19:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:19:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-11-23 20:19:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:19:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2019-11-23 20:19:00,253 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 47 [2019-11-23 20:19:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,254 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2019-11-23 20:19:00,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:19:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2019-11-23 20:19:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:19:00,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,255 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:00,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,456 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash -966443113, now seen corresponding path program 11 times [2019-11-23 20:19:00,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:00,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866044655] [2019-11-23 20:19:00,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:19:00,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866044655] [2019-11-23 20:19:00,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284161761] [2019-11-23 20:19:00,595 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,685 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 20:19:00,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:00,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:19:00,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:19:00,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:00,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2019-11-23 20:19:00,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021012895] [2019-11-23 20:19:00,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:19:00,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:19:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:00,782 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 20 states. [2019-11-23 20:19:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:00,901 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-11-23 20:19:00,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:19:00,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2019-11-23 20:19:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:00,903 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:19:00,903 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:19:00,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:19:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2019-11-23 20:19:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:19:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2019-11-23 20:19:00,909 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 49 [2019-11-23 20:19:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,909 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2019-11-23 20:19:00,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:19:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2019-11-23 20:19:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:19:00,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,910 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:01,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:01,114 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1108613395, now seen corresponding path program 12 times [2019-11-23 20:19:01,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:01,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364816250] [2019-11-23 20:19:01,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:19:01,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364816250] [2019-11-23 20:19:01,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925532497] [2019-11-23 20:19:01,274 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:01,438 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:19:01,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:01,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:19:01,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:19:01,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:01,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-11-23 20:19:01,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869937171] [2019-11-23 20:19:01,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:19:01,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:01,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:19:01,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:19:01,538 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 22 states. [2019-11-23 20:19:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:01,631 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2019-11-23 20:19:01,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:19:01,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2019-11-23 20:19:01,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:01,634 INFO L225 Difference]: With dead ends: 136 [2019-11-23 20:19:01,634 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:19:01,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:19:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:19:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2019-11-23 20:19:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:19:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2019-11-23 20:19:01,640 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 54 [2019-11-23 20:19:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:01,641 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2019-11-23 20:19:01,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:19:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2019-11-23 20:19:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:19:01,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:01,642 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:01,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:01,846 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2019-11-23 20:19:01,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:01,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316580022] [2019-11-23 20:19:01,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:19:01,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316580022] [2019-11-23 20:19:01,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050984751] [2019-11-23 20:19:01,986 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:02,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:19:02,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:19:02,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:02,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:19:02,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450467777] [2019-11-23 20:19:02,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:19:02,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:19:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:19:02,062 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 17 states. [2019-11-23 20:19:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:02,134 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2019-11-23 20:19:02,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:19:02,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2019-11-23 20:19:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:02,135 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:19:02,136 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:19:02,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:19:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:19:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-23 20:19:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:19:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2019-11-23 20:19:02,142 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2019-11-23 20:19:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:02,142 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2019-11-23 20:19:02,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:19:02,143 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2019-11-23 20:19:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:19:02,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:02,144 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:02,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:02,347 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:02,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2019-11-23 20:19:02,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:02,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297616506] [2019-11-23 20:19:02,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:19:02,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297616506] [2019-11-23 20:19:02,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509005446] [2019-11-23 20:19:02,525 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:02,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:02,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:02,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:19:02,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:19:02,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:02,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:19:02,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104994486] [2019-11-23 20:19:02,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:19:02,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:02,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:19:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:19:02,609 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2019-11-23 20:19:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:02,662 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2019-11-23 20:19:02,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:19:02,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-11-23 20:19:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:02,663 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:19:02,663 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:19:02,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:19:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:19:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-11-23 20:19:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:19:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2019-11-23 20:19:02,668 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2019-11-23 20:19:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:02,669 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2019-11-23 20:19:02,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:19:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2019-11-23 20:19:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:19:02,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:02,670 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:02,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:02,880 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2019-11-23 20:19:02,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:02,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070219053] [2019-11-23 20:19:02,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:19:03,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070219053] [2019-11-23 20:19:03,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357693449] [2019-11-23 20:19:03,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:03,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:19:03,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:03,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:19:03,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:19:03,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:03,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2019-11-23 20:19:03,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604226198] [2019-11-23 20:19:03,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:19:03,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:19:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:03,243 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 26 states. [2019-11-23 20:19:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:03,410 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2019-11-23 20:19:03,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:19:03,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2019-11-23 20:19:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:03,412 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:19:03,412 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:19:03,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:19:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2019-11-23 20:19:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:19:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2019-11-23 20:19:03,418 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2019-11-23 20:19:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:03,418 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2019-11-23 20:19:03,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:19:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2019-11-23 20:19:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:19:03,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:03,419 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:03,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:03,620 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2019-11-23 20:19:03,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:03,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737915311] [2019-11-23 20:19:03,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:19:03,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737915311] [2019-11-23 20:19:03,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882040251] [2019-11-23 20:19:03,798 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:03,852 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:03,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:03,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:19:03,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:19:03,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:03,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:19:03,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321211930] [2019-11-23 20:19:03,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:19:03,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:19:03,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:03,871 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 20 states. [2019-11-23 20:19:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:03,947 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2019-11-23 20:19:03,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:19:03,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2019-11-23 20:19:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:03,951 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:19:03,951 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:19:03,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:19:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-23 20:19:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:19:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2019-11-23 20:19:03,956 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2019-11-23 20:19:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:03,956 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2019-11-23 20:19:03,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:19:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2019-11-23 20:19:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:19:03,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:03,957 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:04,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:04,161 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2019-11-23 20:19:04,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:04,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503974081] [2019-11-23 20:19:04,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:19:04,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503974081] [2019-11-23 20:19:04,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55253020] [2019-11-23 20:19:04,362 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:04,531 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-23 20:19:04,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:04,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:19:04,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:19:04,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:04,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-11-23 20:19:04,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823512685] [2019-11-23 20:19:04,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:19:04,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:19:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:04,682 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 29 states. [2019-11-23 20:19:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:04,843 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2019-11-23 20:19:04,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:19:04,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2019-11-23 20:19:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:04,845 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:19:04,845 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:19:04,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:19:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2019-11-23 20:19:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 20:19:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2019-11-23 20:19:04,851 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2019-11-23 20:19:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:04,852 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2019-11-23 20:19:04,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:19:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2019-11-23 20:19:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:19:04,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:04,853 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:05,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:05,056 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:05,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:05,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2019-11-23 20:19:05,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:05,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115038232] [2019-11-23 20:19:05,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-23 20:19:05,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115038232] [2019-11-23 20:19:05,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605154021] [2019-11-23 20:19:05,332 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:05,836 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:19:05,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:05,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:19:05,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:19:06,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:06,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2019-11-23 20:19:06,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369488613] [2019-11-23 20:19:06,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:19:06,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:06,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:19:06,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:06,046 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 31 states. [2019-11-23 20:19:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:06,225 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2019-11-23 20:19:06,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:19:06,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2019-11-23 20:19:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:06,227 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:19:06,227 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 20:19:06,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 20:19:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2019-11-23 20:19:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 20:19:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2019-11-23 20:19:06,232 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2019-11-23 20:19:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:06,232 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2019-11-23 20:19:06,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:19:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2019-11-23 20:19:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:19:06,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:06,233 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:06,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:06,438 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2019-11-23 20:19:06,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:06,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199989019] [2019-11-23 20:19:06,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:19:06,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199989019] [2019-11-23 20:19:06,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083931144] [2019-11-23 20:19:06,685 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:06,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:19:06,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:19:06,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:06,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:19:06,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884479951] [2019-11-23 20:19:06,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:19:06,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:19:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:06,772 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 23 states. [2019-11-23 20:19:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:06,870 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2019-11-23 20:19:06,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:19:06,872 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2019-11-23 20:19:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:06,873 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:19:06,873 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:19:06,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:19:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-11-23 20:19:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:19:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2019-11-23 20:19:06,877 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2019-11-23 20:19:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:06,878 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2019-11-23 20:19:06,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:19:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2019-11-23 20:19:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 20:19:06,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:06,879 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:07,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:07,084 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2019-11-23 20:19:07,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:07,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262435630] [2019-11-23 20:19:07,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:19:07,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262435630] [2019-11-23 20:19:07,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508794656] [2019-11-23 20:19:07,337 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:07,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:07,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:07,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:19:07,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:19:07,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:07,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:19:07,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686943185] [2019-11-23 20:19:07,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:19:07,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:07,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:19:07,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:19:07,457 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 24 states. [2019-11-23 20:19:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:07,546 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2019-11-23 20:19:07,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:19:07,547 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2019-11-23 20:19:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:07,547 INFO L225 Difference]: With dead ends: 190 [2019-11-23 20:19:07,548 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 20:19:07,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:19:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 20:19:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-11-23 20:19:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 20:19:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2019-11-23 20:19:07,553 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2019-11-23 20:19:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:07,553 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2019-11-23 20:19:07,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:19:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2019-11-23 20:19:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:19:07,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:07,554 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:07,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:07,765 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2019-11-23 20:19:07,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:07,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114192068] [2019-11-23 20:19:07,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:19:08,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114192068] [2019-11-23 20:19:08,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464464737] [2019-11-23 20:19:08,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:08,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:19:08,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:08,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:19:08,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:19:08,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:08,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2019-11-23 20:19:08,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335213724] [2019-11-23 20:19:08,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:19:08,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:19:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:19:08,358 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 35 states. [2019-11-23 20:19:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:08,561 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2019-11-23 20:19:08,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:19:08,562 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2019-11-23 20:19:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:08,563 INFO L225 Difference]: With dead ends: 202 [2019-11-23 20:19:08,563 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:19:08,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:19:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:19:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2019-11-23 20:19:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 20:19:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2019-11-23 20:19:08,569 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2019-11-23 20:19:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:08,569 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2019-11-23 20:19:08,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:19:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2019-11-23 20:19:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:19:08,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:08,571 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:08,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:08,774 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:08,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2019-11-23 20:19:08,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:08,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055990079] [2019-11-23 20:19:08,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 20:19:09,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055990079] [2019-11-23 20:19:09,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470644639] [2019-11-23 20:19:09,056 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:09,121 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:09,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:09,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:19:09,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 20:19:09,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:09,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:19:09,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405517219] [2019-11-23 20:19:09,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:19:09,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:09,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:19:09,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:09,143 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 26 states. [2019-11-23 20:19:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:09,234 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2019-11-23 20:19:09,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:19:09,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2019-11-23 20:19:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:09,236 INFO L225 Difference]: With dead ends: 206 [2019-11-23 20:19:09,236 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:19:09,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:19:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-23 20:19:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 20:19:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2019-11-23 20:19:09,241 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2019-11-23 20:19:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:09,241 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2019-11-23 20:19:09,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:19:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2019-11-23 20:19:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:19:09,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:09,242 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:09,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:09,446 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2019-11-23 20:19:09,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:09,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413750226] [2019-11-23 20:19:09,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 20:19:09,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413750226] [2019-11-23 20:19:09,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828016921] [2019-11-23 20:19:09,790 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:10,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-23 20:19:10,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:10,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:19:10,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:19:10,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:10,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2019-11-23 20:19:10,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420459111] [2019-11-23 20:19:10,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:19:10,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:10,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:19:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:10,576 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 38 states. [2019-11-23 20:19:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:10,740 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2019-11-23 20:19:10,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:19:10,741 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2019-11-23 20:19:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:10,742 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:19:10,742 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:19:10,743 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:19:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2019-11-23 20:19:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-23 20:19:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2019-11-23 20:19:10,749 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2019-11-23 20:19:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:10,749 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2019-11-23 20:19:10,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:19:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2019-11-23 20:19:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:19:10,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:10,750 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:10,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:10,956 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2019-11-23 20:19:10,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:10,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572906646] [2019-11-23 20:19:10,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-11-23 20:19:11,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572906646] [2019-11-23 20:19:11,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913344350] [2019-11-23 20:19:11,278 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:12,481 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:19:12,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:12,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:19:12,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 20:19:12,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:12,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2019-11-23 20:19:12,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856970999] [2019-11-23 20:19:12,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:19:12,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:19:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:19:12,787 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 40 states. [2019-11-23 20:19:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:13,016 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2019-11-23 20:19:13,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:19:13,021 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2019-11-23 20:19:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:13,022 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:19:13,022 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:19:13,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:19:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:19:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2019-11-23 20:19:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 20:19:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2019-11-23 20:19:13,029 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2019-11-23 20:19:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:13,029 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2019-11-23 20:19:13,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:19:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2019-11-23 20:19:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:19:13,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:13,030 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:13,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:13,231 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2019-11-23 20:19:13,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:13,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915724922] [2019-11-23 20:19:13,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:19:13,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915724922] [2019-11-23 20:19:13,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6404226] [2019-11-23 20:19:13,729 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:13,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:19:13,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:19:13,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:13,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:19:13,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743061091] [2019-11-23 20:19:13,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:19:13,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:19:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:13,851 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 29 states. [2019-11-23 20:19:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:13,943 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2019-11-23 20:19:13,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:19:13,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2019-11-23 20:19:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:13,945 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:19:13,945 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 20:19:13,946 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 20:19:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-11-23 20:19:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-23 20:19:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2019-11-23 20:19:13,950 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2019-11-23 20:19:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:13,951 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2019-11-23 20:19:13,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:19:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2019-11-23 20:19:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:19:13,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:13,952 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:14,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:14,155 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2019-11-23 20:19:14,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:14,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366349617] [2019-11-23 20:19:14,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:19:14,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366349617] [2019-11-23 20:19:14,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075346383] [2019-11-23 20:19:14,658 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:14,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:14,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:14,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:19:14,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:19:14,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:14,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:19:14,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385656114] [2019-11-23 20:19:14,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:19:14,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:14,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:19:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:14,808 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 30 states. [2019-11-23 20:19:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:14,924 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2019-11-23 20:19:14,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:19:14,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 103 [2019-11-23 20:19:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:14,926 INFO L225 Difference]: With dead ends: 238 [2019-11-23 20:19:14,926 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:19:14,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:19:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2019-11-23 20:19:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 20:19:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2019-11-23 20:19:14,938 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2019-11-23 20:19:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:14,938 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2019-11-23 20:19:14,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:19:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2019-11-23 20:19:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:19:14,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:14,940 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:15,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:15,147 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2019-11-23 20:19:15,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:15,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484150236] [2019-11-23 20:19:15,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:19:15,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484150236] [2019-11-23 20:19:15,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167637186] [2019-11-23 20:19:15,570 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:15,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:19:15,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:15,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:19:15,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 20:19:16,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:16,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2019-11-23 20:19:16,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235313737] [2019-11-23 20:19:16,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:19:16,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:19:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:19:16,055 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 44 states. [2019-11-23 20:19:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:16,331 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2019-11-23 20:19:16,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:19:16,331 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2019-11-23 20:19:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:16,332 INFO L225 Difference]: With dead ends: 250 [2019-11-23 20:19:16,333 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:19:16,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:19:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:19:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2019-11-23 20:19:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-23 20:19:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2019-11-23 20:19:16,338 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2019-11-23 20:19:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:16,338 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2019-11-23 20:19:16,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:19:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2019-11-23 20:19:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-23 20:19:16,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:16,340 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:16,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:16,544 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:16,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2019-11-23 20:19:16,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:16,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506547800] [2019-11-23 20:19:16,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:19:16,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506547800] [2019-11-23 20:19:16,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700039807] [2019-11-23 20:19:16,967 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:17,036 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:17,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:17,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:19:17,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:19:17,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:17,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:19:17,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196371974] [2019-11-23 20:19:17,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:19:17,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:17,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:19:17,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:19:17,061 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 32 states. [2019-11-23 20:19:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:17,157 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2019-11-23 20:19:17,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:19:17,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2019-11-23 20:19:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:17,160 INFO L225 Difference]: With dead ends: 254 [2019-11-23 20:19:17,160 INFO L226 Difference]: Without dead ends: 158 [2019-11-23 20:19:17,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:19:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-23 20:19:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-11-23 20:19:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-23 20:19:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2019-11-23 20:19:17,165 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2019-11-23 20:19:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:17,165 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2019-11-23 20:19:17,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:19:17,165 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2019-11-23 20:19:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 20:19:17,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:17,166 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:17,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:17,369 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2019-11-23 20:19:17,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:17,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659828585] [2019-11-23 20:19:17,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:19:17,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659828585] [2019-11-23 20:19:17,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648690357] [2019-11-23 20:19:17,960 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:20,636 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-11-23 20:19:20,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:20,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:19:20,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:20,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:20,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2019-11-23 20:19:20,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805799640] [2019-11-23 20:19:20,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:19:20,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:19:20,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:19:20,924 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 47 states. [2019-11-23 20:19:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:21,230 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2019-11-23 20:19:21,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:19:21,231 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2019-11-23 20:19:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:21,232 INFO L225 Difference]: With dead ends: 266 [2019-11-23 20:19:21,232 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:19:21,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:19:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:19:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2019-11-23 20:19:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-23 20:19:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2019-11-23 20:19:21,243 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2019-11-23 20:19:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:21,244 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2019-11-23 20:19:21,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:19:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2019-11-23 20:19:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:19:21,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:21,245 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:21,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:21,452 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2019-11-23 20:19:21,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:21,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736057179] [2019-11-23 20:19:21,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-23 20:19:22,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736057179] [2019-11-23 20:19:22,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802181990] [2019-11-23 20:19:22,036 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:27,043 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 20:19:27,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:27,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:19:27,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 60 proven. 330 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:27,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:27,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20] total 51 [2019-11-23 20:19:27,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457638399] [2019-11-23 20:19:27,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:19:27,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:19:27,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=1803, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:19:27,447 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 51 states. [2019-11-23 20:19:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:28,228 INFO L93 Difference]: Finished difference Result 281 states and 356 transitions. [2019-11-23 20:19:28,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:19:28,230 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 117 [2019-11-23 20:19:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:28,231 INFO L225 Difference]: With dead ends: 281 [2019-11-23 20:19:28,231 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 20:19:28,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1051, Invalid=3371, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 20:19:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 20:19:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2019-11-23 20:19:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 20:19:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-11-23 20:19:28,238 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 117 [2019-11-23 20:19:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:28,238 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-11-23 20:19:28,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:19:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-11-23 20:19:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:19:28,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:28,240 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:28,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:28,444 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 31 times [2019-11-23 20:19:28,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:28,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245841525] [2019-11-23 20:19:28,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:19:28,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245841525] [2019-11-23 20:19:29,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933958495] [2019-11-23 20:19:29,002 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:29,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:19:29,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:19:29,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:29,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:19:29,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610856293] [2019-11-23 20:19:29,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:19:29,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:19:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:29,133 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 36 states. [2019-11-23 20:19:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:29,267 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2019-11-23 20:19:29,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:19:29,270 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2019-11-23 20:19:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:29,271 INFO L225 Difference]: With dead ends: 286 [2019-11-23 20:19:29,271 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 20:19:29,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 20:19:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2019-11-23 20:19:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-23 20:19:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2019-11-23 20:19:29,278 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2019-11-23 20:19:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:29,278 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2019-11-23 20:19:29,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:19:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2019-11-23 20:19:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 20:19:29,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:29,279 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:29,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:29,483 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 32 times [2019-11-23 20:19:29,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:29,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811409699] [2019-11-23 20:19:29,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:19:30,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811409699] [2019-11-23 20:19:30,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995204110] [2019-11-23 20:19:30,039 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:30,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:30,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:30,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:19:30,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:19:30,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:30,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:19:30,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583862307] [2019-11-23 20:19:30,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:19:30,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:19:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:19:30,167 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand 37 states. [2019-11-23 20:19:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:30,310 INFO L93 Difference]: Finished difference Result 288 states and 360 transitions. [2019-11-23 20:19:30,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:19:30,311 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 126 [2019-11-23 20:19:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:30,312 INFO L225 Difference]: With dead ends: 288 [2019-11-23 20:19:30,312 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 20:19:30,313 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:19:30,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 20:19:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2019-11-23 20:19:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-23 20:19:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2019-11-23 20:19:30,318 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 126 [2019-11-23 20:19:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:30,318 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2019-11-23 20:19:30,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:19:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2019-11-23 20:19:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 20:19:30,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:30,319 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:30,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:30,524 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1832394393, now seen corresponding path program 33 times [2019-11-23 20:19:30,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:30,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248401337] [2019-11-23 20:19:30,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:19:31,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248401337] [2019-11-23 20:19:31,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709441946] [2019-11-23 20:19:31,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:31,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 20:19:31,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:31,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:19:31,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-11-23 20:19:32,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:32,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 19] total 54 [2019-11-23 20:19:32,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878565751] [2019-11-23 20:19:32,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:19:32,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:32,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:19:32,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=2026, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:19:32,391 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand 54 states. [2019-11-23 20:19:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:32,665 INFO L93 Difference]: Finished difference Result 300 states and 378 transitions. [2019-11-23 20:19:32,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:19:32,666 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2019-11-23 20:19:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:32,667 INFO L225 Difference]: With dead ends: 300 [2019-11-23 20:19:32,667 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:19:32,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=836, Invalid=2026, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:19:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:19:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2019-11-23 20:19:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-11-23 20:19:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2019-11-23 20:19:32,673 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 128 [2019-11-23 20:19:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:32,673 INFO L462 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2019-11-23 20:19:32,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:19:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2019-11-23 20:19:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:19:32,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:32,674 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:32,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:32,879 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 34 times [2019-11-23 20:19:32,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:32,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300861857] [2019-11-23 20:19:32,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:19:33,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300861857] [2019-11-23 20:19:33,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223706461] [2019-11-23 20:19:33,717 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:33,809 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:33,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:33,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:19:33,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:19:33,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:33,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:19:33,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918131428] [2019-11-23 20:19:33,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:19:33,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:19:33,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:33,868 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand 39 states. [2019-11-23 20:19:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:34,104 INFO L93 Difference]: Finished difference Result 304 states and 380 transitions. [2019-11-23 20:19:34,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:19:34,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 133 [2019-11-23 20:19:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:34,106 INFO L225 Difference]: With dead ends: 304 [2019-11-23 20:19:34,106 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 20:19:34,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 20:19:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2019-11-23 20:19:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-11-23 20:19:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 227 transitions. [2019-11-23 20:19:34,114 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 227 transitions. Word has length 133 [2019-11-23 20:19:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:34,114 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 227 transitions. [2019-11-23 20:19:34,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:19:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 227 transitions. [2019-11-23 20:19:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:19:34,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:34,116 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:34,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:34,320 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash 749111461, now seen corresponding path program 35 times [2019-11-23 20:19:34,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:34,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340095646] [2019-11-23 20:19:34,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:19:34,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340095646] [2019-11-23 20:19:34,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342085564] [2019-11-23 20:19:34,933 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:37,592 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:19:37,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:37,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:19:37,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2019-11-23 20:19:38,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:38,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 20] total 57 [2019-11-23 20:19:38,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604436679] [2019-11-23 20:19:38,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 20:19:38,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:38,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 20:19:38,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2262, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:19:38,017 INFO L87 Difference]: Start difference. First operand 189 states and 227 transitions. Second operand 57 states. [2019-11-23 20:19:38,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:38,353 INFO L93 Difference]: Finished difference Result 316 states and 398 transitions. [2019-11-23 20:19:38,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 20:19:38,354 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 135 [2019-11-23 20:19:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:38,355 INFO L225 Difference]: With dead ends: 316 [2019-11-23 20:19:38,355 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:19:38,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=930, Invalid=2262, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:19:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:19:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2019-11-23 20:19:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 20:19:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2019-11-23 20:19:38,363 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 135 [2019-11-23 20:19:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:38,363 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2019-11-23 20:19:38,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 20:19:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2019-11-23 20:19:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 20:19:38,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:38,365 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:38,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:38,572 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2132049311, now seen corresponding path program 36 times [2019-11-23 20:19:38,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:38,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744058391] [2019-11-23 20:19:38,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2019-11-23 20:19:39,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744058391] [2019-11-23 20:19:39,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473623682] [2019-11-23 20:19:39,177 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:46,058 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2019-11-23 20:19:46,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:46,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:19:46,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 20:19:46,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:46,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 21] total 59 [2019-11-23 20:19:46,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503526464] [2019-11-23 20:19:46,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-23 20:19:46,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-23 20:19:46,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=2433, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:19:46,543 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand 59 states. [2019-11-23 20:19:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:46,892 INFO L93 Difference]: Finished difference Result 330 states and 416 transitions. [2019-11-23 20:19:46,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-23 20:19:46,893 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 140 [2019-11-23 20:19:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:46,894 INFO L225 Difference]: With dead ends: 330 [2019-11-23 20:19:46,894 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 20:19:46,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=989, Invalid=2433, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:19:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 20:19:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2019-11-23 20:19:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-11-23 20:19:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2019-11-23 20:19:46,901 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 140 [2019-11-23 20:19:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:46,901 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2019-11-23 20:19:46,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-23 20:19:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2019-11-23 20:19:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:19:46,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:46,903 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:47,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:47,110 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:47,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:47,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 37 times [2019-11-23 20:19:47,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:47,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855184960] [2019-11-23 20:19:47,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:19:47,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855184960] [2019-11-23 20:19:47,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932951285] [2019-11-23 20:19:47,787 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:47,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:19:47,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:19:47,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:47,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:19:47,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298081600] [2019-11-23 20:19:47,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:19:47,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:47,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:19:47,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:19:47,923 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 42 states. [2019-11-23 20:19:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:48,071 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2019-11-23 20:19:48,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:19:48,071 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2019-11-23 20:19:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:48,073 INFO L225 Difference]: With dead ends: 334 [2019-11-23 20:19:48,073 INFO L226 Difference]: Without dead ends: 208 [2019-11-23 20:19:48,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:19:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-23 20:19:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2019-11-23 20:19:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-23 20:19:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2019-11-23 20:19:48,080 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2019-11-23 20:19:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:48,080 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2019-11-23 20:19:48,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:19:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2019-11-23 20:19:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:19:48,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:48,081 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:48,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:48,285 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 38 times [2019-11-23 20:19:48,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:48,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10491900] [2019-11-23 20:19:48,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:19:49,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10491900] [2019-11-23 20:19:49,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225600505] [2019-11-23 20:19:49,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:49,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:49,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:49,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:19:49,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:19:49,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:49,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:19:49,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187729443] [2019-11-23 20:19:49,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:19:49,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:19:49,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:19:49,180 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 43 states. [2019-11-23 20:19:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:49,334 INFO L93 Difference]: Finished difference Result 336 states and 420 transitions. [2019-11-23 20:19:49,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:19:49,335 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2019-11-23 20:19:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:49,336 INFO L225 Difference]: With dead ends: 336 [2019-11-23 20:19:49,336 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 20:19:49,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:19:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 20:19:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2019-11-23 20:19:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-23 20:19:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 251 transitions. [2019-11-23 20:19:49,343 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 251 transitions. Word has length 147 [2019-11-23 20:19:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:49,343 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 251 transitions. [2019-11-23 20:19:49,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:19:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 251 transitions. [2019-11-23 20:19:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 20:19:49,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:49,345 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:49,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:49,548 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -940523107, now seen corresponding path program 39 times [2019-11-23 20:19:49,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:49,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497181506] [2019-11-23 20:19:49,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:19:50,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497181506] [2019-11-23 20:19:50,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048739993] [2019-11-23 20:19:50,454 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:51,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 20:19:51,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:51,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:19:51,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 20:19:51,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:51,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 22] total 63 [2019-11-23 20:19:51,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065528993] [2019-11-23 20:19:51,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-23 20:19:51,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-23 20:19:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=2773, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:19:51,943 INFO L87 Difference]: Start difference. First operand 209 states and 251 transitions. Second operand 63 states. [2019-11-23 20:19:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:52,300 INFO L93 Difference]: Finished difference Result 348 states and 438 transitions. [2019-11-23 20:19:52,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-23 20:19:52,300 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 149 [2019-11-23 20:19:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:52,302 INFO L225 Difference]: With dead ends: 348 [2019-11-23 20:19:52,302 INFO L226 Difference]: Without dead ends: 222 [2019-11-23 20:19:52,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1133, Invalid=2773, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:19:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-23 20:19:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2019-11-23 20:19:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-11-23 20:19:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 261 transitions. [2019-11-23 20:19:52,308 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 261 transitions. Word has length 149 [2019-11-23 20:19:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:52,309 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 261 transitions. [2019-11-23 20:19:52,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-23 20:19:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 261 transitions. [2019-11-23 20:19:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-23 20:19:52,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:52,310 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:52,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:52,515 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash -399083993, now seen corresponding path program 40 times [2019-11-23 20:19:52,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:52,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85755091] [2019-11-23 20:19:52,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-11-23 20:19:53,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85755091] [2019-11-23 20:19:53,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444474294] [2019-11-23 20:19:53,283 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:53,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:53,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:53,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:19:53,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2019-11-23 20:19:53,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:53,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 23] total 65 [2019-11-23 20:19:53,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406021942] [2019-11-23 20:19:53,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 20:19:53,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 20:19:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=2962, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:19:53,976 INFO L87 Difference]: Start difference. First operand 217 states and 261 transitions. Second operand 65 states. [2019-11-23 20:19:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:54,369 INFO L93 Difference]: Finished difference Result 362 states and 456 transitions. [2019-11-23 20:19:54,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-23 20:19:54,369 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 154 [2019-11-23 20:19:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:54,371 INFO L225 Difference]: With dead ends: 362 [2019-11-23 20:19:54,371 INFO L226 Difference]: Without dead ends: 230 [2019-11-23 20:19:54,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1198, Invalid=2962, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:19:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-11-23 20:19:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2019-11-23 20:19:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-11-23 20:19:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 271 transitions. [2019-11-23 20:19:54,378 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 271 transitions. Word has length 154 [2019-11-23 20:19:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:54,378 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 271 transitions. [2019-11-23 20:19:54,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 20:19:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 271 transitions. [2019-11-23 20:19:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:19:54,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:54,380 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:54,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:54,584 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:54,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1525124967, now seen corresponding path program 41 times [2019-11-23 20:19:54,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:54,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933167465] [2019-11-23 20:19:54,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2019-11-23 20:19:55,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933167465] [2019-11-23 20:19:55,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140566702] [2019-11-23 20:19:55,402 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:59,324 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2019-11-23 20:19:59,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:59,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:19:59,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2019-11-23 20:19:59,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:59,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 24] total 67 [2019-11-23 20:19:59,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247566707] [2019-11-23 20:19:59,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-11-23 20:19:59,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-11-23 20:19:59,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1265, Invalid=3157, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 20:19:59,955 INFO L87 Difference]: Start difference. First operand 225 states and 271 transitions. Second operand 67 states. [2019-11-23 20:20:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:00,253 INFO L93 Difference]: Finished difference Result 376 states and 474 transitions. [2019-11-23 20:20:00,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-11-23 20:20:00,254 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 159 [2019-11-23 20:20:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:00,255 INFO L225 Difference]: With dead ends: 376 [2019-11-23 20:20:00,255 INFO L226 Difference]: Without dead ends: 238 [2019-11-23 20:20:00,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1265, Invalid=3157, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 20:20:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-11-23 20:20:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 233. [2019-11-23 20:20:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-23 20:20:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 281 transitions. [2019-11-23 20:20:00,262 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 281 transitions. Word has length 159 [2019-11-23 20:20:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:00,262 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 281 transitions. [2019-11-23 20:20:00,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-11-23 20:20:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 281 transitions. [2019-11-23 20:20:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 20:20:00,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:00,264 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:00,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:00,473 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1844626645, now seen corresponding path program 42 times [2019-11-23 20:20:00,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:00,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837105694] [2019-11-23 20:20:00,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:20:01,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837105694] [2019-11-23 20:20:01,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719098818] [2019-11-23 20:20:01,368 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:16,449 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2019-11-23 20:20:16,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:16,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:20:16,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:20:16,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:16,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-11-23 20:20:16,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773847674] [2019-11-23 20:20:16,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:20:16,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:20:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:20:16,522 INFO L87 Difference]: Start difference. First operand 233 states and 281 transitions. Second operand 47 states. [2019-11-23 20:20:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:16,709 INFO L93 Difference]: Finished difference Result 380 states and 476 transitions. [2019-11-23 20:20:16,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:20:16,709 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 164 [2019-11-23 20:20:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:16,711 INFO L225 Difference]: With dead ends: 380 [2019-11-23 20:20:16,711 INFO L226 Difference]: Without dead ends: 236 [2019-11-23 20:20:16,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:20:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-11-23 20:20:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2019-11-23 20:20:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-11-23 20:20:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2019-11-23 20:20:16,718 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 164 [2019-11-23 20:20:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:16,719 INFO L462 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2019-11-23 20:20:16,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:20:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2019-11-23 20:20:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:20:16,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:16,720 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:16,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:16,932 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 43 times [2019-11-23 20:20:16,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:16,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666064065] [2019-11-23 20:20:16,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:20:18,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666064065] [2019-11-23 20:20:18,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271474649] [2019-11-23 20:20:18,336 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:18,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:20:18,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:20:18,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:18,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-11-23 20:20:18,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600357420] [2019-11-23 20:20:18,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:20:18,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:20:18,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:20:18,565 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand 48 states. [2019-11-23 20:20:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:18,778 INFO L93 Difference]: Finished difference Result 382 states and 478 transitions. [2019-11-23 20:20:18,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:20:18,779 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 166 [2019-11-23 20:20:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:18,781 INFO L225 Difference]: With dead ends: 382 [2019-11-23 20:20:18,781 INFO L226 Difference]: Without dead ends: 238 [2019-11-23 20:20:18,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:20:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-11-23 20:20:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2019-11-23 20:20:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-11-23 20:20:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 285 transitions. [2019-11-23 20:20:18,791 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 285 transitions. Word has length 166 [2019-11-23 20:20:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:18,792 INFO L462 AbstractCegarLoop]: Abstraction has 237 states and 285 transitions. [2019-11-23 20:20:18,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:20:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 285 transitions. [2019-11-23 20:20:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:20:18,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:18,794 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:18,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:18,999 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1955789487, now seen corresponding path program 44 times [2019-11-23 20:20:19,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:19,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7692953] [2019-11-23 20:20:19,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:20:20,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7692953] [2019-11-23 20:20:20,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560704854] [2019-11-23 20:20:20,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:20,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:20,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:20,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 20:20:20,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:20:20,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:20,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-11-23 20:20:20,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485090446] [2019-11-23 20:20:20,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:20:20,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:20,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:20:20,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:20:20,355 INFO L87 Difference]: Start difference. First operand 237 states and 285 transitions. Second operand 49 states. [2019-11-23 20:20:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:20,512 INFO L93 Difference]: Finished difference Result 384 states and 480 transitions. [2019-11-23 20:20:20,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:20:20,512 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 168 [2019-11-23 20:20:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:20,513 INFO L225 Difference]: With dead ends: 384 [2019-11-23 20:20:20,514 INFO L226 Difference]: Without dead ends: 240 [2019-11-23 20:20:20,514 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:20:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-11-23 20:20:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2019-11-23 20:20:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-11-23 20:20:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 287 transitions. [2019-11-23 20:20:20,519 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 287 transitions. Word has length 168 [2019-11-23 20:20:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:20,520 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 287 transitions. [2019-11-23 20:20:20,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:20:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 287 transitions. [2019-11-23 20:20:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-23 20:20:20,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:20,521 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:20,725 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,726 INFO L82 PathProgramCache]: Analyzing trace with hash 427263409, now seen corresponding path program 45 times [2019-11-23 20:20:20,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385166661] [2019-11-23 20:20:20,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:20:21,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385166661] [2019-11-23 20:20:21,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162628780] [2019-11-23 20:20:21,597 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:23,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-23 20:20:23,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:23,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:20:23,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2019-11-23 20:20:23,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:23,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 25] total 72 [2019-11-23 20:20:23,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821995594] [2019-11-23 20:20:23,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-23 20:20:23,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:23,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-23 20:20:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1475, Invalid=3637, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:20:23,977 INFO L87 Difference]: Start difference. First operand 239 states and 287 transitions. Second operand 72 states. [2019-11-23 20:20:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:24,510 INFO L93 Difference]: Finished difference Result 396 states and 498 transitions. [2019-11-23 20:20:24,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-23 20:20:24,510 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 170 [2019-11-23 20:20:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:24,512 INFO L225 Difference]: With dead ends: 396 [2019-11-23 20:20:24,513 INFO L226 Difference]: Without dead ends: 252 [2019-11-23 20:20:24,514 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1475, Invalid=3637, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:20:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-11-23 20:20:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2019-11-23 20:20:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2019-11-23 20:20:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2019-11-23 20:20:24,521 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 170 [2019-11-23 20:20:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:24,521 INFO L462 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2019-11-23 20:20:24,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-11-23 20:20:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2019-11-23 20:20:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 20:20:24,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:24,524 INFO L410 BasicCegarLoop]: trace histogram [47, 47, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:24,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:24,733 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1280868145, now seen corresponding path program 46 times [2019-11-23 20:20:24,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:24,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427342070] [2019-11-23 20:20:24,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:20:25,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427342070] [2019-11-23 20:20:25,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014176071] [2019-11-23 20:20:25,657 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:25,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:25,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:25,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:20:25,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:20:25,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:25,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2019-11-23 20:20:25,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611605715] [2019-11-23 20:20:25,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:20:25,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:25,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:20:25,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:20:25,817 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand 51 states. [2019-11-23 20:20:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,962 INFO L93 Difference]: Finished difference Result 400 states and 500 transitions. [2019-11-23 20:20:25,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:20:25,962 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2019-11-23 20:20:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,964 INFO L225 Difference]: With dead ends: 400 [2019-11-23 20:20:25,964 INFO L226 Difference]: Without dead ends: 250 [2019-11-23 20:20:25,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:20:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-11-23 20:20:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2019-11-23 20:20:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-11-23 20:20:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 299 transitions. [2019-11-23 20:20:25,970 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 299 transitions. Word has length 175 [2019-11-23 20:20:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,971 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 299 transitions. [2019-11-23 20:20:25,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:20:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 299 transitions. [2019-11-23 20:20:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 20:20:25,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,972 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]