/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_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:20:23,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:20:23,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:20:23,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:20:23,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:20:23,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:20:23,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:20:23,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:20:23,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:20:23,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:20:23,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:20:23,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:20:23,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:20:23,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:20:23,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:20:23,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:20:23,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:20:23,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:20:23,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:20:23,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:20:23,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:20:23,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:20:23,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:20:23,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:20:23,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:20:23,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:20:23,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:20:23,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:20:23,469 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 20:20:23,483 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:20:23,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:20:23,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:20:23,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:20:23,485 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:20:23,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:20:23,485 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:20:23,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:20:23,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:20:23,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:20:23,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:20:23,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:20:23,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:20:23,487 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:20:23,487 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:20:23,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:20:23,487 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:20:23,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:20:23,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:20:23,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:20:23,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:20:23,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:20:23,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:23,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:20:23,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:20:23,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:20:23,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:20:23,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:20:23,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:20:23,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:20:23,767 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:20:23,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:20:23,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:20:23,785 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:20:23,785 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:20:23,786 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2019-11-23 20:20:23,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7199ac5/2ce6e1cfed234a27b9050dbffde26294/FLAG834ba1bc5 [2019-11-23 20:20:24,290 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:20:24,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2019-11-23 20:20:24,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7199ac5/2ce6e1cfed234a27b9050dbffde26294/FLAG834ba1bc5 [2019-11-23 20:20:24,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7199ac5/2ce6e1cfed234a27b9050dbffde26294 [2019-11-23 20:20:24,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:20:24,707 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:20:24,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:24,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:20:24,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:20:24,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:24" (1/1) ... [2019-11-23 20:20:24,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623a7446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:24, skipping insertion in model container [2019-11-23 20:20:24,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:24" (1/1) ... [2019-11-23 20:20:24,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:20:24,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:20:24,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:24,987 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:20:25,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:25,123 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:20:25,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25 WrapperNode [2019-11-23 20:20:25,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:25,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:25,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:20:25,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:20:25,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:25,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:20:25,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:20:25,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:20:25,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (1/1) ... [2019-11-23 20:20:25,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:20:25,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:20:25,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:20:25,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:20:25,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (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 20:20:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:20:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:20:25,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:20:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:20:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:20:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:20:25,655 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:20:25,655 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-23 20:20:25,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:25 BoogieIcfgContainer [2019-11-23 20:20:25,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:20:25,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:20:25,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:20:25,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:20:25,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:20:24" (1/3) ... [2019-11-23 20:20:25,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f00c5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:25, skipping insertion in model container [2019-11-23 20:20:25,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:25" (2/3) ... [2019-11-23 20:20:25,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f00c5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:25, skipping insertion in model container [2019-11-23 20:20:25,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:25" (3/3) ... [2019-11-23 20:20:25,664 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2019-11-23 20:20:25,672 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:20:25,678 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 20:20:25,688 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 20:20:25,707 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:20:25,707 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:20:25,707 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:20:25,707 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:20:25,708 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:20:25,708 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:20:25,708 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:20:25,708 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:20:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-23 20:20:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:25,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,729 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:25,729 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2019-11-23 20:20:25,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:25,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382646450] [2019-11-23 20:20:25,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,854 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 20:20:25,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382646450] [2019-11-23 20:20:25,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:25,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:20:25,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601225503] [2019-11-23 20:20:25,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:20:25,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:20:25,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:25,879 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-23 20:20:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,902 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2019-11-23 20:20:25,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:20:25,905 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:20:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,917 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:20:25,918 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:20:25,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:20:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:20:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:20:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:20:25,957 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2019-11-23 20:20:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,958 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:20:25,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:20:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:20:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:25,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,959 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:25,960 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2019-11-23 20:20:25,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:25,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064456964] [2019-11-23 20:20:25,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,006 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 20:20:26,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064456964] [2019-11-23 20:20:26,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:26,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:26,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872418799] [2019-11-23 20:20:26,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:26,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:26,010 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2019-11-23 20:20:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,039 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2019-11-23 20:20:26,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:26,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:20:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,041 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:20:26,041 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:20:26,043 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 20:20:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:20:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 20:20:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:20:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-11-23 20:20:26,050 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 10 [2019-11-23 20:20:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,050 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-11-23 20:20:26,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-11-23 20:20:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:20:26,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,052 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1369117107, now seen corresponding path program 1 times [2019-11-23 20:20:26,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442435752] [2019-11-23 20:20:26,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,102 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 20:20:26,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442435752] [2019-11-23 20:20:26,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:26,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:26,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572005386] [2019-11-23 20:20:26,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:26,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:26,105 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 3 states. [2019-11-23 20:20:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,207 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-23 20:20:26,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:26,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:20:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,209 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:20:26,209 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:20:26,209 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 20:20:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:20:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2019-11-23 20:20:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:20:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-11-23 20:20:26,217 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 12 [2019-11-23 20:20:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,218 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-11-23 20:20:26,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-11-23 20:20:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:26,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,219 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,219 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2019-11-23 20:20:26,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441534182] [2019-11-23 20:20:26,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:26,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441534182] [2019-11-23 20:20:26,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918897695] [2019-11-23 20:20:26,295 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 20:20:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:26,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:26,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:20:26,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759148929] [2019-11-23 20:20:26,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:20:26,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:20:26,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:26,391 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 5 states. [2019-11-23 20:20:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,420 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2019-11-23 20:20:26,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:26,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:20:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,422 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:20:26,422 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:20:26,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:20:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:20:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:20:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:20:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-11-23 20:20:26,429 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2019-11-23 20:20:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,430 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-11-23 20:20:26,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:20:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-11-23 20:20:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:20:26,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,432 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,644 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1270281666, now seen corresponding path program 2 times [2019-11-23 20:20:26,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075580779] [2019-11-23 20:20:26,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:26,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075580779] [2019-11-23 20:20:26,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771793955] [2019-11-23 20:20:26,718 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 20:20:26,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:20:26,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:26,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:20:26,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:26,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-23 20:20:26,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553707539] [2019-11-23 20:20:26,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:26,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:26,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:26,803 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 4 states. [2019-11-23 20:20:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,904 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2019-11-23 20:20:26,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:26,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-23 20:20:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,906 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:20:26,906 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:20:26,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:20:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2019-11-23 20:20:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:20:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2019-11-23 20:20:26,913 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 16 [2019-11-23 20:20:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,913 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2019-11-23 20:20:26,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2019-11-23 20:20:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:20:26,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,914 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 20:20:27,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,119 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2019-11-23 20:20:27,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:27,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150682462] [2019-11-23 20:20:27,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:20:27,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150682462] [2019-11-23 20:20:27,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844674994] [2019-11-23 20:20:27,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:27,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:27,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:27,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-11-23 20:20:27,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905208411] [2019-11-23 20:20:27,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:20:27,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:20:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:27,281 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 7 states. [2019-11-23 20:20:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:27,408 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2019-11-23 20:20:27,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:27,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-23 20:20:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:27,410 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:20:27,410 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:20:27,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:20:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2019-11-23 20:20:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:20:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-11-23 20:20:27,429 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 19 [2019-11-23 20:20:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:27,429 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-11-23 20:20:27,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:20:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-11-23 20:20:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:20:27,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:27,430 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 20:20:27,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,631 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1406890192, now seen corresponding path program 1 times [2019-11-23 20:20:27,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:27,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461423262] [2019-11-23 20:20:27,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:27,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461423262] [2019-11-23 20:20:27,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118890599] [2019-11-23 20:20:27,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:27,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:27,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:27,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:20:27,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111421253] [2019-11-23 20:20:27,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:20:27,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:20:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:27,757 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 7 states. [2019-11-23 20:20:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:27,794 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2019-11-23 20:20:27,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:20:27,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-23 20:20:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:27,796 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:20:27,796 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:20:27,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:20:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 20:20:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:20:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2019-11-23 20:20:27,811 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 21 [2019-11-23 20:20:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:27,811 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2019-11-23 20:20:27,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:20:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2019-11-23 20:20:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:20:27,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:27,816 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,020 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1622061326, now seen corresponding path program 2 times [2019-11-23 20:20:28,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857626212] [2019-11-23 20:20:28,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:28,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857626212] [2019-11-23 20:20:28,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899720119] [2019-11-23 20:20:28,117 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 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 20:20:28,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:20:28,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:28,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:28,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:20:28,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:28,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-11-23 20:20:28,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316017195] [2019-11-23 20:20:28,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:28,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:28,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:20:28,202 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 4 states. [2019-11-23 20:20:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:28,258 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2019-11-23 20:20:28,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:28,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 20:20:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:28,260 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:20:28,260 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:20:28,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:20:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:20:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-11-23 20:20:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:20:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2019-11-23 20:20:28,275 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 23 [2019-11-23 20:20:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:28,276 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2019-11-23 20:20:28,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2019-11-23 20:20:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:20:28,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:28,278 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,485 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1256932737, now seen corresponding path program 1 times [2019-11-23 20:20:28,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197242750] [2019-11-23 20:20:28,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:28,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197242750] [2019-11-23 20:20:28,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812714850] [2019-11-23 20:20:28,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:28,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:28,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:28,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:20:28,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797998750] [2019-11-23 20:20:28,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:28,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:28,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:28,655 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 8 states. [2019-11-23 20:20:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:28,686 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2019-11-23 20:20:28,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:28,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-23 20:20:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:28,689 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:20:28,689 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:20:28,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 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 20:20:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:20:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-23 20:20:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:20:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-11-23 20:20:28,703 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 24 [2019-11-23 20:20:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:28,703 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-11-23 20:20:28,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-11-23 20:20:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:20:28,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:28,705 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,908 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash 815114625, now seen corresponding path program 2 times [2019-11-23 20:20:28,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567754078] [2019-11-23 20:20:28,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:28,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567754078] [2019-11-23 20:20:28,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943732706] [2019-11-23 20:20:28,991 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 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 20:20:29,032 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:20:29,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:29,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:20:29,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:29,115 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:20:29,116 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 59 [2019-11-23 20:20:29,117 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:20:29,125 INFO L567 ElimStorePlain]: treesize reduction 25, result has 30.6 percent of original size [2019-11-23 20:20:29,125 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:20:29,126 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:1 [2019-11-23 20:20:29,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:20:29,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:20:29,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2019-11-23 20:20:29,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614673010] [2019-11-23 20:20:29,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:29,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:29,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:20:29,157 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 4 states. [2019-11-23 20:20:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:29,250 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2019-11-23 20:20:29,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:20:29,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-23 20:20:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:29,252 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:20:29,252 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:20:29,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:20:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2019-11-23 20:20:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:20:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2019-11-23 20:20:29,259 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 26 [2019-11-23 20:20:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:29,260 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2019-11-23 20:20:29,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2019-11-23 20:20:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:20:29,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:29,261 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:29,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,462 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1001637431, now seen corresponding path program 1 times [2019-11-23 20:20:29,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:29,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194549587] [2019-11-23 20:20:29,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:20:29,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194549587] [2019-11-23 20:20:29,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812382395] [2019-11-23 20:20:29,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:29,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:29,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:20:29,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:29,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2019-11-23 20:20:29,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272148316] [2019-11-23 20:20:29,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:29,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:29,650 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 11 states. [2019-11-23 20:20:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:29,794 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2019-11-23 20:20:29,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:29,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2019-11-23 20:20:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:29,795 INFO L225 Difference]: With dead ends: 135 [2019-11-23 20:20:29,795 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:20:29,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:20:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2019-11-23 20:20:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:20:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2019-11-23 20:20:29,803 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 30 [2019-11-23 20:20:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:29,803 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2019-11-23 20:20:29,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2019-11-23 20:20:29,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:20:29,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:29,805 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:30,005 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1148017865, now seen corresponding path program 2 times [2019-11-23 20:20:30,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655599974] [2019-11-23 20:20:30,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:20:30,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655599974] [2019-11-23 20:20:30,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470651199] [2019-11-23 20:20:30,103 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 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 20:20:30,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:30,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:30,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:30,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:20:30,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:30,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-11-23 20:20:30,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573751351] [2019-11-23 20:20:30,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:20:30,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:20:30,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:20:30,257 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 14 states. [2019-11-23 20:20:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:30,661 INFO L93 Difference]: Finished difference Result 300 states and 389 transitions. [2019-11-23 20:20:30,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:20:30,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-23 20:20:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:30,663 INFO L225 Difference]: With dead ends: 300 [2019-11-23 20:20:30,664 INFO L226 Difference]: Without dead ends: 241 [2019-11-23 20:20:30,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-23 20:20:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 115. [2019-11-23 20:20:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:20:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2019-11-23 20:20:30,676 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 35 [2019-11-23 20:20:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:30,677 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2019-11-23 20:20:30,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:20:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2019-11-23 20:20:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:20:30,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,678 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:30,882 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 623203963, now seen corresponding path program 3 times [2019-11-23 20:20:30,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373991196] [2019-11-23 20:20:30,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:30,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373991196] [2019-11-23 20:20:30,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596538374] [2019-11-23 20:20:30,977 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 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 20:20:31,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:20:31,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:31,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:31,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:31,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:31,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-23 20:20:31,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682855669] [2019-11-23 20:20:31,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:31,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:31,087 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand 12 states. [2019-11-23 20:20:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,169 INFO L93 Difference]: Finished difference Result 213 states and 293 transitions. [2019-11-23 20:20:31,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:31,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2019-11-23 20:20:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,174 INFO L225 Difference]: With dead ends: 213 [2019-11-23 20:20:31,174 INFO L226 Difference]: Without dead ends: 135 [2019-11-23 20:20:31,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-23 20:20:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2019-11-23 20:20:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-23 20:20:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2019-11-23 20:20:31,186 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 40 [2019-11-23 20:20:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,187 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2019-11-23 20:20:31,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2019-11-23 20:20:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:20:31,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,189 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,400 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash -463001291, now seen corresponding path program 4 times [2019-11-23 20:20:31,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220315691] [2019-11-23 20:20:31,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:31,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220315691] [2019-11-23 20:20:31,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410474831] [2019-11-23 20:20:31,527 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 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 20:20:31,580 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:31,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:31,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:31,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:31,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:31,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2019-11-23 20:20:31,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540695077] [2019-11-23 20:20:31,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:20:31,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:20:31,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:20:31,676 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand 16 states. [2019-11-23 20:20:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,979 INFO L93 Difference]: Finished difference Result 248 states and 340 transitions. [2019-11-23 20:20:31,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:20:31,980 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2019-11-23 20:20:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,981 INFO L225 Difference]: With dead ends: 248 [2019-11-23 20:20:31,981 INFO L226 Difference]: Without dead ends: 144 [2019-11-23 20:20:31,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-23 20:20:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2019-11-23 20:20:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:20:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2019-11-23 20:20:31,990 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 43 [2019-11-23 20:20:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,991 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2019-11-23 20:20:31,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:20:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2019-11-23 20:20:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:20:31,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,993 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,196 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1866958269, now seen corresponding path program 5 times [2019-11-23 20:20:32,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108905176] [2019-11-23 20:20:32,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:20:32,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108905176] [2019-11-23 20:20:32,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991177016] [2019-11-23 20:20:32,284 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 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 20:20:32,394 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-23 20:20:32,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:32,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:32,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:32,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-11-23 20:20:32,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103095671] [2019-11-23 20:20:32,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:20:32,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:20:32,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:20:32,517 INFO L87 Difference]: Start difference. First operand 129 states and 173 transitions. Second operand 19 states. [2019-11-23 20:20:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:33,236 INFO L93 Difference]: Finished difference Result 656 states and 878 transitions. [2019-11-23 20:20:33,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:20:33,237 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2019-11-23 20:20:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:33,240 INFO L225 Difference]: With dead ends: 656 [2019-11-23 20:20:33,240 INFO L226 Difference]: Without dead ends: 542 [2019-11-23 20:20:33,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:20:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-11-23 20:20:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 155. [2019-11-23 20:20:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-23 20:20:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 213 transitions. [2019-11-23 20:20:33,253 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 213 transitions. Word has length 48 [2019-11-23 20:20:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:33,254 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 213 transitions. [2019-11-23 20:20:33,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:20:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 213 transitions. [2019-11-23 20:20:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:20:33,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,255 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:33,459 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1082415729, now seen corresponding path program 6 times [2019-11-23 20:20:33,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908248333] [2019-11-23 20:20:33,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-23 20:20:33,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908248333] [2019-11-23 20:20:33,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218658142] [2019-11-23 20:20:33,570 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 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 20:20:33,662 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:20:33,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:33,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:20:33,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:33,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:33,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-11-23 20:20:33,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101018314] [2019-11-23 20:20:33,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:33,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:33,770 INFO L87 Difference]: Start difference. First operand 155 states and 213 transitions. Second operand 20 states. [2019-11-23 20:20:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,077 INFO L93 Difference]: Finished difference Result 312 states and 436 transitions. [2019-11-23 20:20:34,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:20:34,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2019-11-23 20:20:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,083 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:20:34,083 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 20:20:34,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:20:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 20:20:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 163. [2019-11-23 20:20:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-23 20:20:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 223 transitions. [2019-11-23 20:20:34,093 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 223 transitions. Word has length 53 [2019-11-23 20:20:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,093 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 223 transitions. [2019-11-23 20:20:34,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 223 transitions. [2019-11-23 20:20:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 20:20:34,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,095 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,298 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,299 INFO L82 PathProgramCache]: Analyzing trace with hash -97943423, now seen corresponding path program 7 times [2019-11-23 20:20:34,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448479043] [2019-11-23 20:20:34,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 20:20:34,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448479043] [2019-11-23 20:20:34,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071084792] [2019-11-23 20:20:34,418 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 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 20:20:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:20:34,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-11-23 20:20:34,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217327208] [2019-11-23 20:20:34,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:20:34,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:20:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:34,610 INFO L87 Difference]: Start difference. First operand 163 states and 223 transitions. Second operand 23 states. [2019-11-23 20:20:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:35,546 INFO L93 Difference]: Finished difference Result 808 states and 1081 transitions. [2019-11-23 20:20:35,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:20:35,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2019-11-23 20:20:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:35,555 INFO L225 Difference]: With dead ends: 808 [2019-11-23 20:20:35,555 INFO L226 Difference]: Without dead ends: 664 [2019-11-23 20:20:35,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:20:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-11-23 20:20:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 183. [2019-11-23 20:20:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-11-23 20:20:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 253 transitions. [2019-11-23 20:20:35,572 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 253 transitions. Word has length 58 [2019-11-23 20:20:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:35,573 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 253 transitions. [2019-11-23 20:20:35,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:20:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 253 transitions. [2019-11-23 20:20:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:20:35,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:35,574 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:35,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,784 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:35,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1801135021, now seen corresponding path program 8 times [2019-11-23 20:20:35,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:35,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547514805] [2019-11-23 20:20:35,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-23 20:20:35,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547514805] [2019-11-23 20:20:35,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400028756] [2019-11-23 20:20:35,920 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 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 20:20:35,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:35,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:35,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:20:35,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 20:20:36,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:36,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-11-23 20:20:36,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139713981] [2019-11-23 20:20:36,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:20:36,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:20:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:36,092 INFO L87 Difference]: Start difference. First operand 183 states and 253 transitions. Second operand 24 states. [2019-11-23 20:20:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,452 INFO L93 Difference]: Finished difference Result 364 states and 512 transitions. [2019-11-23 20:20:36,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:20:36,452 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2019-11-23 20:20:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,454 INFO L225 Difference]: With dead ends: 364 [2019-11-23 20:20:36,454 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:20:36,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:20:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:20:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 191. [2019-11-23 20:20:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-23 20:20:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 263 transitions. [2019-11-23 20:20:36,465 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 263 transitions. Word has length 63 [2019-11-23 20:20:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,465 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 263 transitions. [2019-11-23 20:20:36,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:20:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 263 transitions. [2019-11-23 20:20:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:20:36,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,466 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,670 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1338114885, now seen corresponding path program 9 times [2019-11-23 20:20:36,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524481904] [2019-11-23 20:20:36,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:36,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524481904] [2019-11-23 20:20:36,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439370824] [2019-11-23 20:20:36,810 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 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 20:20:36,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:20:36,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:36,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:37,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2019-11-23 20:20:37,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768610409] [2019-11-23 20:20:37,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:20:37,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:20:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:20:37,056 INFO L87 Difference]: Start difference. First operand 191 states and 263 transitions. Second operand 25 states. [2019-11-23 20:20:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:38,267 INFO L93 Difference]: Finished difference Result 925 states and 1237 transitions. [2019-11-23 20:20:38,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:20:38,267 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 68 [2019-11-23 20:20:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:38,271 INFO L225 Difference]: With dead ends: 925 [2019-11-23 20:20:38,272 INFO L226 Difference]: Without dead ends: 817 [2019-11-23 20:20:38,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=648, Invalid=2322, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:20:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2019-11-23 20:20:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 209. [2019-11-23 20:20:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-23 20:20:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2019-11-23 20:20:38,290 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 68 [2019-11-23 20:20:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:38,291 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2019-11-23 20:20:38,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:20:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2019-11-23 20:20:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:20:38,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:38,292 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:38,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,504 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:38,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1294544853, now seen corresponding path program 10 times [2019-11-23 20:20:38,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:38,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835750706] [2019-11-23 20:20:38,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:38,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835750706] [2019-11-23 20:20:38,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620540651] [2019-11-23 20:20:38,672 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 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 20:20:38,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:38,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:38,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:20:38,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:20:38,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:38,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2019-11-23 20:20:38,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581101492] [2019-11-23 20:20:38,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:20:38,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:20:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:20:38,997 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 28 states. [2019-11-23 20:20:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:40,128 INFO L93 Difference]: Finished difference Result 1043 states and 1396 transitions. [2019-11-23 20:20:40,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:20:40,128 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2019-11-23 20:20:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:40,132 INFO L225 Difference]: With dead ends: 1043 [2019-11-23 20:20:40,132 INFO L226 Difference]: Without dead ends: 857 [2019-11-23 20:20:40,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=1878, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:20:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2019-11-23 20:20:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 223. [2019-11-23 20:20:40,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-11-23 20:20:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 311 transitions. [2019-11-23 20:20:40,149 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 311 transitions. Word has length 71 [2019-11-23 20:20:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:40,149 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 311 transitions. [2019-11-23 20:20:40,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:20:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 311 transitions. [2019-11-23 20:20:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:20:40,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:40,150 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:40,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:40,354 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:40,355 INFO L82 PathProgramCache]: Analyzing trace with hash -406553593, now seen corresponding path program 11 times [2019-11-23 20:20:40,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:40,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405517106] [2019-11-23 20:20:40,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:20:40,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405517106] [2019-11-23 20:20:40,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381221187] [2019-11-23 20:20:40,521 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 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 20:20:40,723 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:20:40,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:40,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:20:40,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 20:20:40,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:40,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2019-11-23 20:20:40,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126646286] [2019-11-23 20:20:40,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:20:40,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:20:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:20:40,955 INFO L87 Difference]: Start difference. First operand 223 states and 311 transitions. Second operand 30 states. [2019-11-23 20:20:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,201 INFO L93 Difference]: Finished difference Result 1128 states and 1510 transitions. [2019-11-23 20:20:42,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:20:42,201 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2019-11-23 20:20:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,205 INFO L225 Difference]: With dead ends: 1128 [2019-11-23 20:20:42,205 INFO L226 Difference]: Without dead ends: 930 [2019-11-23 20:20:42,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=665, Invalid=2197, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:20:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2019-11-23 20:20:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 237. [2019-11-23 20:20:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-11-23 20:20:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 331 transitions. [2019-11-23 20:20:42,223 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 331 transitions. Word has length 76 [2019-11-23 20:20:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,223 INFO L462 AbstractCegarLoop]: Abstraction has 237 states and 331 transitions. [2019-11-23 20:20:42,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:20:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 331 transitions. [2019-11-23 20:20:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:20:42,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,224 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:42,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:42,436 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2000396569, now seen corresponding path program 12 times [2019-11-23 20:20:42,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:42,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353668421] [2019-11-23 20:20:42,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-23 20:20:42,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353668421] [2019-11-23 20:20:42,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899616658] [2019-11-23 20:20:42,604 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 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 20:20:43,057 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:20:43,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:43,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:20:43,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 20:20:43,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:43,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2019-11-23 20:20:43,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052468093] [2019-11-23 20:20:43,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:20:43,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:20:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:20:43,346 INFO L87 Difference]: Start difference. First operand 237 states and 331 transitions. Second operand 32 states. [2019-11-23 20:20:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:44,756 INFO L93 Difference]: Finished difference Result 1213 states and 1624 transitions. [2019-11-23 20:20:44,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:20:44,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 81 [2019-11-23 20:20:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:44,762 INFO L225 Difference]: With dead ends: 1213 [2019-11-23 20:20:44,762 INFO L226 Difference]: Without dead ends: 1003 [2019-11-23 20:20:44,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=2541, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:20:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2019-11-23 20:20:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 251. [2019-11-23 20:20:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2019-11-23 20:20:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 351 transitions. [2019-11-23 20:20:44,781 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 351 transitions. Word has length 81 [2019-11-23 20:20:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:44,782 INFO L462 AbstractCegarLoop]: Abstraction has 251 states and 351 transitions. [2019-11-23 20:20:44,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:20:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 351 transitions. [2019-11-23 20:20:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:20:44,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:44,783 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:44,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:44,988 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1837099339, now seen corresponding path program 13 times [2019-11-23 20:20:44,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:44,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473913944] [2019-11-23 20:20:44,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2019-11-23 20:20:45,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473913944] [2019-11-23 20:20:45,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421866942] [2019-11-23 20:20:45,236 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 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 20:20:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:20:45,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 20:20:45,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:45,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-11-23 20:20:45,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777115992] [2019-11-23 20:20:45,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:20:45,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:45,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:20:45,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:20:45,475 INFO L87 Difference]: Start difference. First operand 251 states and 351 transitions. Second operand 33 states. [2019-11-23 20:20:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:46,291 INFO L93 Difference]: Finished difference Result 492 states and 700 transitions. [2019-11-23 20:20:46,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:20:46,291 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 86 [2019-11-23 20:20:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:46,292 INFO L225 Difference]: With dead ends: 492 [2019-11-23 20:20:46,292 INFO L226 Difference]: Without dead ends: 274 [2019-11-23 20:20:46,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=592, Invalid=1760, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:20:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-11-23 20:20:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2019-11-23 20:20:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-23 20:20:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2019-11-23 20:20:46,307 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 86 [2019-11-23 20:20:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:46,308 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2019-11-23 20:20:46,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:20:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2019-11-23 20:20:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:20:46,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:46,309 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:46,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:46,512 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash -243407453, now seen corresponding path program 14 times [2019-11-23 20:20:46,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:46,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135305945] [2019-11-23 20:20:46,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-11-23 20:20:46,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135305945] [2019-11-23 20:20:46,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996377240] [2019-11-23 20:20:46,774 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 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 20:20:46,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:46,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:46,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:20:46,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:20:47,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:47,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2019-11-23 20:20:47,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727372576] [2019-11-23 20:20:47,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:20:47,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:20:47,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:20:47,018 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 35 states. [2019-11-23 20:20:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:47,596 INFO L93 Difference]: Finished difference Result 506 states and 718 transitions. [2019-11-23 20:20:47,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:20:47,598 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 91 [2019-11-23 20:20:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:47,600 INFO L225 Difference]: With dead ends: 506 [2019-11-23 20:20:47,600 INFO L226 Difference]: Without dead ends: 282 [2019-11-23 20:20:47,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:20:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-11-23 20:20:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 267. [2019-11-23 20:20:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-11-23 20:20:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 371 transitions. [2019-11-23 20:20:47,613 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 371 transitions. Word has length 91 [2019-11-23 20:20:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:47,613 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 371 transitions. [2019-11-23 20:20:47,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:20:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 371 transitions. [2019-11-23 20:20:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:20:47,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:47,614 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:47,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:47,817 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1213431439, now seen corresponding path program 15 times [2019-11-23 20:20:47,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:47,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538226090] [2019-11-23 20:20:47,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-11-23 20:20:48,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538226090] [2019-11-23 20:20:48,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390543344] [2019-11-23 20:20:48,054 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 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 20:20:48,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:20:48,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:48,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:20:48,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-11-23 20:20:48,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:48,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2019-11-23 20:20:48,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500118004] [2019-11-23 20:20:48,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:20:48,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:48,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:20:48,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:20:48,630 INFO L87 Difference]: Start difference. First operand 267 states and 371 transitions. Second operand 37 states. [2019-11-23 20:20:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:50,559 INFO L93 Difference]: Finished difference Result 1415 states and 1896 transitions. [2019-11-23 20:20:50,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-23 20:20:50,560 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 96 [2019-11-23 20:20:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:50,564 INFO L225 Difference]: With dead ends: 1415 [2019-11-23 20:20:50,564 INFO L226 Difference]: Without dead ends: 1277 [2019-11-23 20:20:50,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1512, Invalid=5628, Unknown=0, NotChecked=0, Total=7140 [2019-11-23 20:20:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2019-11-23 20:20:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 291. [2019-11-23 20:20:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2019-11-23 20:20:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 409 transitions. [2019-11-23 20:20:50,586 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 409 transitions. Word has length 96 [2019-11-23 20:20:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:50,586 INFO L462 AbstractCegarLoop]: Abstraction has 291 states and 409 transitions. [2019-11-23 20:20:50,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:20:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 409 transitions. [2019-11-23 20:20:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:20:50,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:50,588 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:50,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:50,792 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash -592373599, now seen corresponding path program 16 times [2019-11-23 20:20:50,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:50,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304132293] [2019-11-23 20:20:50,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-11-23 20:20:51,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304132293] [2019-11-23 20:20:51,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035637292] [2019-11-23 20:20:51,166 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 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 20:20:51,235 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:51,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:51,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:20:51,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-23 20:20:51,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:51,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2019-11-23 20:20:51,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495237708] [2019-11-23 20:20:51,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:20:51,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:20:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:20:51,422 INFO L87 Difference]: Start difference. First operand 291 states and 409 transitions. Second operand 38 states. [2019-11-23 20:20:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:51,979 INFO L93 Difference]: Finished difference Result 568 states and 812 transitions. [2019-11-23 20:20:51,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:20:51,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 99 [2019-11-23 20:20:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:51,981 INFO L225 Difference]: With dead ends: 568 [2019-11-23 20:20:51,981 INFO L226 Difference]: Without dead ends: 314 [2019-11-23 20:20:51,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:20:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-11-23 20:20:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 299. [2019-11-23 20:20:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2019-11-23 20:20:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 419 transitions. [2019-11-23 20:20:52,004 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 419 transitions. Word has length 99 [2019-11-23 20:20:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:52,004 INFO L462 AbstractCegarLoop]: Abstraction has 299 states and 419 transitions. [2019-11-23 20:20:52,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:20:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 419 transitions. [2019-11-23 20:20:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:20:52,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:52,005 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:52,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:52,210 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash -364257071, now seen corresponding path program 17 times [2019-11-23 20:20:52,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:52,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983907721] [2019-11-23 20:20:52,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-11-23 20:20:52,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983907721] [2019-11-23 20:20:52,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152962039] [2019-11-23 20:20:52,529 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 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 20:20:53,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 20:20:53,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:53,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:20:53,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-23 20:20:53,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:53,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2019-11-23 20:20:53,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27581011] [2019-11-23 20:20:53,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:20:53,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:20:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:20:53,541 INFO L87 Difference]: Start difference. First operand 299 states and 419 transitions. Second operand 40 states. [2019-11-23 20:20:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:54,255 INFO L93 Difference]: Finished difference Result 582 states and 830 transitions. [2019-11-23 20:20:54,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:20:54,257 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 104 [2019-11-23 20:20:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:54,259 INFO L225 Difference]: With dead ends: 582 [2019-11-23 20:20:54,259 INFO L226 Difference]: Without dead ends: 322 [2019-11-23 20:20:54,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:20:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2019-11-23 20:20:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 307. [2019-11-23 20:20:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2019-11-23 20:20:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 429 transitions. [2019-11-23 20:20:54,277 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 429 transitions. Word has length 104 [2019-11-23 20:20:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:54,277 INFO L462 AbstractCegarLoop]: Abstraction has 307 states and 429 transitions. [2019-11-23 20:20:54,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:20:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 429 transitions. [2019-11-23 20:20:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:20:54,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:54,278 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:54,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:54,483 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1765729501, now seen corresponding path program 18 times [2019-11-23 20:20:54,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:54,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750144482] [2019-11-23 20:20:54,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-11-23 20:20:54,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750144482] [2019-11-23 20:20:54,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77562688] [2019-11-23 20:20:54,765 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 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 20:20:55,552 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-23 20:20:55,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:55,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:20:55,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2019-11-23 20:20:55,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:55,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2019-11-23 20:20:55,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367173835] [2019-11-23 20:20:55,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:20:55,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:55,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:20:55,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:20:55,943 INFO L87 Difference]: Start difference. First operand 307 states and 429 transitions. Second operand 43 states. [2019-11-23 20:20:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:58,149 INFO L93 Difference]: Finished difference Result 1757 states and 2356 transitions. [2019-11-23 20:20:58,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-11-23 20:20:58,156 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 109 [2019-11-23 20:20:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:58,161 INFO L225 Difference]: With dead ends: 1757 [2019-11-23 20:20:58,161 INFO L226 Difference]: Without dead ends: 1487 [2019-11-23 20:20:58,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1490, Invalid=4990, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 20:20:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2019-11-23 20:20:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 333. [2019-11-23 20:20:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2019-11-23 20:20:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 469 transitions. [2019-11-23 20:20:58,185 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 469 transitions. Word has length 109 [2019-11-23 20:20:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:58,186 INFO L462 AbstractCegarLoop]: Abstraction has 333 states and 469 transitions. [2019-11-23 20:20:58,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:20:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 469 transitions. [2019-11-23 20:20:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-23 20:20:58,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:58,187 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:58,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:58,392 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash -857546603, now seen corresponding path program 19 times [2019-11-23 20:20:58,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:58,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434595620] [2019-11-23 20:20:58,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2019-11-23 20:20:58,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434595620] [2019-11-23 20:20:58,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463714624] [2019-11-23 20:20:58,739 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 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 20:20:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:58,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:20:58,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-23 20:20:59,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:59,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2019-11-23 20:20:59,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246317930] [2019-11-23 20:20:59,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:20:59,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:20:59,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:20:59,025 INFO L87 Difference]: Start difference. First operand 333 states and 469 transitions. Second operand 44 states. [2019-11-23 20:20:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:59,845 INFO L93 Difference]: Finished difference Result 646 states and 926 transitions. [2019-11-23 20:20:59,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:20:59,846 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 114 [2019-11-23 20:20:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:59,848 INFO L225 Difference]: With dead ends: 646 [2019-11-23 20:20:59,848 INFO L226 Difference]: Without dead ends: 356 [2019-11-23 20:20:59,849 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:20:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-11-23 20:20:59,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 341. [2019-11-23 20:20:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-11-23 20:20:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 479 transitions. [2019-11-23 20:20:59,868 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 479 transitions. Word has length 114 [2019-11-23 20:20:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:59,868 INFO L462 AbstractCegarLoop]: Abstraction has 341 states and 479 transitions. [2019-11-23 20:20:59,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:20:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 479 transitions. [2019-11-23 20:20:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:20:59,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:59,869 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:00,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:00,072 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1250101529, now seen corresponding path program 20 times [2019-11-23 20:21:00,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:00,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743521505] [2019-11-23 20:21:00,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2019-11-23 20:21:00,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743521505] [2019-11-23 20:21:00,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900364293] [2019-11-23 20:21:00,379 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 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 20:21:00,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:00,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:00,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:21:00,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 20:21:00,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:00,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2019-11-23 20:21:00,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538728265] [2019-11-23 20:21:00,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:21:00,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:21:00,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=1629, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:21:00,942 INFO L87 Difference]: Start difference. First operand 341 states and 479 transitions. Second operand 47 states. [2019-11-23 20:21:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:03,253 INFO L93 Difference]: Finished difference Result 1909 states and 2559 transitions. [2019-11-23 20:21:03,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-23 20:21:03,254 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 119 [2019-11-23 20:21:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:03,258 INFO L225 Difference]: With dead ends: 1909 [2019-11-23 20:21:03,259 INFO L226 Difference]: Without dead ends: 1609 [2019-11-23 20:21:03,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1793, Invalid=6039, Unknown=0, NotChecked=0, Total=7832 [2019-11-23 20:21:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2019-11-23 20:21:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 361. [2019-11-23 20:21:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2019-11-23 20:21:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 509 transitions. [2019-11-23 20:21:03,284 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 509 transitions. Word has length 119 [2019-11-23 20:21:03,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:03,285 INFO L462 AbstractCegarLoop]: Abstraction has 361 states and 509 transitions. [2019-11-23 20:21:03,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:21:03,285 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 509 transitions. [2019-11-23 20:21:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:21:03,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:03,286 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:03,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:03,489 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash -367155111, now seen corresponding path program 21 times [2019-11-23 20:21:03,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:03,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943553878] [2019-11-23 20:21:03,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2019-11-23 20:21:04,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943553878] [2019-11-23 20:21:04,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008413722] [2019-11-23 20:21:04,008 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 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 20:21:05,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 20:21:05,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:05,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:21:05,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 43 proven. 651 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2019-11-23 20:21:06,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:06,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2019-11-23 20:21:06,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827864592] [2019-11-23 20:21:06,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:21:06,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:21:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=1592, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:21:06,028 INFO L87 Difference]: Start difference. First operand 361 states and 509 transitions. Second operand 50 states. [2019-11-23 20:21:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:06,780 INFO L93 Difference]: Finished difference Result 567 states and 827 transitions. [2019-11-23 20:21:06,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:21:06,781 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 124 [2019-11-23 20:21:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:06,782 INFO L225 Difference]: With dead ends: 567 [2019-11-23 20:21:06,782 INFO L226 Difference]: Without dead ends: 381 [2019-11-23 20:21:06,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1739, Invalid=3663, Unknown=0, NotChecked=0, Total=5402 [2019-11-23 20:21:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-11-23 20:21:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 367. [2019-11-23 20:21:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2019-11-23 20:21:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 517 transitions. [2019-11-23 20:21:06,803 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 517 transitions. Word has length 124 [2019-11-23 20:21:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:06,804 INFO L462 AbstractCegarLoop]: Abstraction has 367 states and 517 transitions. [2019-11-23 20:21:06,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:21:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 517 transitions. [2019-11-23 20:21:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 20:21:06,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:06,805 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:07,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:07,010 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2119818601, now seen corresponding path program 22 times [2019-11-23 20:21:07,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:07,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897028696] [2019-11-23 20:21:07,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2019-11-23 20:21:07,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897028696] [2019-11-23 20:21:07,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193504918] [2019-11-23 20:21:07,461 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 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 20:21:07,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:07,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:07,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:21:07,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-11-23 20:21:07,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:07,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2019-11-23 20:21:07,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529329980] [2019-11-23 20:21:07,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:21:07,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:07,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:21:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:21:07,812 INFO L87 Difference]: Start difference. First operand 367 states and 517 transitions. Second operand 49 states. [2019-11-23 20:21:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:08,800 INFO L93 Difference]: Finished difference Result 710 states and 1018 transitions. [2019-11-23 20:21:08,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:21:08,801 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 127 [2019-11-23 20:21:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:08,802 INFO L225 Difference]: With dead ends: 710 [2019-11-23 20:21:08,802 INFO L226 Difference]: Without dead ends: 390 [2019-11-23 20:21:08,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:21:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-11-23 20:21:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 375. [2019-11-23 20:21:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2019-11-23 20:21:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 527 transitions. [2019-11-23 20:21:08,822 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 527 transitions. Word has length 127 [2019-11-23 20:21:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:08,822 INFO L462 AbstractCegarLoop]: Abstraction has 375 states and 527 transitions. [2019-11-23 20:21:08,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:21:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 527 transitions. [2019-11-23 20:21:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-23 20:21:08,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:08,824 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:09,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:09,027 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:09,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1039373339, now seen corresponding path program 23 times [2019-11-23 20:21:09,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:09,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442536036] [2019-11-23 20:21:09,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2019-11-23 20:21:09,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442536036] [2019-11-23 20:21:09,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134386762] [2019-11-23 20:21:09,550 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 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 20:21:11,786 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:21:11,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:11,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:21:11,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-11-23 20:21:12,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:12,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2019-11-23 20:21:12,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994557276] [2019-11-23 20:21:12,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:21:12,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:21:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=1998, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:21:12,692 INFO L87 Difference]: Start difference. First operand 375 states and 527 transitions. Second operand 52 states. [2019-11-23 20:21:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:15,906 INFO L93 Difference]: Finished difference Result 2180 states and 2924 transitions. [2019-11-23 20:21:15,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-11-23 20:21:15,906 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 132 [2019-11-23 20:21:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:15,914 INFO L225 Difference]: With dead ends: 2180 [2019-11-23 20:21:15,914 INFO L226 Difference]: Without dead ends: 1850 [2019-11-23 20:21:15,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2274, Invalid=7626, Unknown=0, NotChecked=0, Total=9900 [2019-11-23 20:21:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-11-23 20:21:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 401. [2019-11-23 20:21:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2019-11-23 20:21:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 567 transitions. [2019-11-23 20:21:15,946 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 567 transitions. Word has length 132 [2019-11-23 20:21:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:15,947 INFO L462 AbstractCegarLoop]: Abstraction has 401 states and 567 transitions. [2019-11-23 20:21:15,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:21:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 567 transitions. [2019-11-23 20:21:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:21:15,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:15,948 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:16,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:16,155 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash 411831379, now seen corresponding path program 24 times [2019-11-23 20:21:16,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:16,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825303725] [2019-11-23 20:21:16,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-23 20:21:16,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825303725] [2019-11-23 20:21:16,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356789256] [2019-11-23 20:21:16,657 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 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 20:21:20,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:21:20,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:20,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:21:20,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 47 proven. 852 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2019-11-23 20:21:21,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:21,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 57 [2019-11-23 20:21:21,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351311537] [2019-11-23 20:21:21,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 20:21:21,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 20:21:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=2479, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:21:21,045 INFO L87 Difference]: Start difference. First operand 401 states and 567 transitions. Second operand 57 states. [2019-11-23 20:21:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:26,507 INFO L93 Difference]: Finished difference Result 2086 states and 2796 transitions. [2019-11-23 20:21:26,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-11-23 20:21:26,507 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 137 [2019-11-23 20:21:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:26,514 INFO L225 Difference]: With dead ends: 2086 [2019-11-23 20:21:26,514 INFO L226 Difference]: Without dead ends: 1882 [2019-11-23 20:21:26,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6906 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5358, Invalid=20402, Unknown=0, NotChecked=0, Total=25760 [2019-11-23 20:21:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2019-11-23 20:21:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 413. [2019-11-23 20:21:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-11-23 20:21:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 585 transitions. [2019-11-23 20:21:26,537 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 585 transitions. Word has length 137 [2019-11-23 20:21:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:26,538 INFO L462 AbstractCegarLoop]: Abstraction has 413 states and 585 transitions. [2019-11-23 20:21:26,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 20:21:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 585 transitions. [2019-11-23 20:21:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 20:21:26,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:26,539 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:26,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:26,740 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1041595299, now seen corresponding path program 25 times [2019-11-23 20:21:26,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:26,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602567860] [2019-11-23 20:21:26,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-23 20:21:27,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602567860] [2019-11-23 20:21:27,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703973173] [2019-11-23 20:21:27,306 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 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 20:21:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:27,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:21:27,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2019-11-23 20:21:28,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:28,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 55 [2019-11-23 20:21:28,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761683938] [2019-11-23 20:21:28,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 20:21:28,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:28,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 20:21:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:21:28,186 INFO L87 Difference]: Start difference. First operand 413 states and 585 transitions. Second operand 55 states. [2019-11-23 20:21:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:31,475 INFO L93 Difference]: Finished difference Result 2312 states and 3100 transitions. [2019-11-23 20:21:31,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-11-23 20:21:31,475 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 140 [2019-11-23 20:21:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:31,481 INFO L225 Difference]: With dead ends: 2312 [2019-11-23 20:21:31,481 INFO L226 Difference]: Without dead ends: 1946 [2019-11-23 20:21:31,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2618, Invalid=8724, Unknown=0, NotChecked=0, Total=11342 [2019-11-23 20:21:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2019-11-23 20:21:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 427. [2019-11-23 20:21:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-11-23 20:21:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 605 transitions. [2019-11-23 20:21:31,515 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 605 transitions. Word has length 140 [2019-11-23 20:21:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:31,515 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 605 transitions. [2019-11-23 20:21:31,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 20:21:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 605 transitions. [2019-11-23 20:21:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:21:31,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:31,516 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:31,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:31,717 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash 722697937, now seen corresponding path program 26 times [2019-11-23 20:21:31,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:31,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019484005] [2019-11-23 20:21:31,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1628 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2019-11-23 20:21:32,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019484005] [2019-11-23 20:21:32,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940386756] [2019-11-23 20:21:32,316 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 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 20:21:32,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:32,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:32,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:21:32,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1628 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2019-11-23 20:21:33,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:33,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 57 [2019-11-23 20:21:33,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997577449] [2019-11-23 20:21:33,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 20:21:33,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:33,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 20:21:33,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=2404, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:21:33,001 INFO L87 Difference]: Start difference. First operand 427 states and 605 transitions. Second operand 57 states. [2019-11-23 20:21:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:36,831 INFO L93 Difference]: Finished difference Result 2397 states and 3214 transitions. [2019-11-23 20:21:36,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-11-23 20:21:36,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 145 [2019-11-23 20:21:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:36,837 INFO L225 Difference]: With dead ends: 2397 [2019-11-23 20:21:36,837 INFO L226 Difference]: Without dead ends: 2019 [2019-11-23 20:21:36,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2813, Invalid=9397, Unknown=0, NotChecked=0, Total=12210 [2019-11-23 20:21:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2019-11-23 20:21:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 441. [2019-11-23 20:21:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-11-23 20:21:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 625 transitions. [2019-11-23 20:21:36,868 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 625 transitions. Word has length 145 [2019-11-23 20:21:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:36,869 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 625 transitions. [2019-11-23 20:21:36,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 20:21:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 625 transitions. [2019-11-23 20:21:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-23 20:21:36,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:36,870 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:37,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:37,070 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash 693221665, now seen corresponding path program 27 times [2019-11-23 20:21:37,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:37,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749229054] [2019-11-23 20:21:37,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2019-11-23 20:21:37,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749229054] [2019-11-23 20:21:37,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575186050] [2019-11-23 20:21:37,849 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 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 20:21:41,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-11-23 20:21:41,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:41,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:21:41,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1082 trivial. 0 not checked. [2019-11-23 20:21:41,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:41,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 58 [2019-11-23 20:21:41,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525269745] [2019-11-23 20:21:41,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 20:21:41,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 20:21:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=2436, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:21:41,718 INFO L87 Difference]: Start difference. First operand 441 states and 625 transitions. Second operand 58 states. [2019-11-23 20:21:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:42,896 INFO L93 Difference]: Finished difference Result 850 states and 1226 transitions. [2019-11-23 20:21:42,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:21:42,896 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 150 [2019-11-23 20:21:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:42,898 INFO L225 Difference]: With dead ends: 850 [2019-11-23 20:21:42,898 INFO L226 Difference]: Without dead ends: 464 [2019-11-23 20:21:42,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1680, Invalid=5460, Unknown=0, NotChecked=0, Total=7140 [2019-11-23 20:21:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-11-23 20:21:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 449. [2019-11-23 20:21:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2019-11-23 20:21:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 635 transitions. [2019-11-23 20:21:42,928 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 635 transitions. Word has length 150 [2019-11-23 20:21:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:42,928 INFO L462 AbstractCegarLoop]: Abstraction has 449 states and 635 transitions. [2019-11-23 20:21:42,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 20:21:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 635 transitions. [2019-11-23 20:21:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:21:42,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:42,930 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:43,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:43,131 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1436676595, now seen corresponding path program 28 times [2019-11-23 20:21:43,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:43,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334869766] [2019-11-23 20:21:43,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2019-11-23 20:21:43,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334869766] [2019-11-23 20:21:43,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355419609] [2019-11-23 20:21:43,746 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 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 20:21:43,849 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:43,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:43,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:21:43,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2019-11-23 20:21:44,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:44,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 60 [2019-11-23 20:21:44,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426597177] [2019-11-23 20:21:44,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-11-23 20:21:44,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-11-23 20:21:44,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:21:44,203 INFO L87 Difference]: Start difference. First operand 449 states and 635 transitions. Second operand 60 states. [2019-11-23 20:21:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:45,441 INFO L93 Difference]: Finished difference Result 864 states and 1244 transitions. [2019-11-23 20:21:45,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-23 20:21:45,441 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 155 [2019-11-23 20:21:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:45,443 INFO L225 Difference]: With dead ends: 864 [2019-11-23 20:21:45,443 INFO L226 Difference]: Without dead ends: 472 [2019-11-23 20:21:45,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1798, Invalid=5858, Unknown=0, NotChecked=0, Total=7656 [2019-11-23 20:21:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-11-23 20:21:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 457. [2019-11-23 20:21:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2019-11-23 20:21:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 645 transitions. [2019-11-23 20:21:45,483 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 645 transitions. Word has length 155 [2019-11-23 20:21:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:45,484 INFO L462 AbstractCegarLoop]: Abstraction has 457 states and 645 transitions. [2019-11-23 20:21:45,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-11-23 20:21:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 645 transitions. [2019-11-23 20:21:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-23 20:21:45,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:45,485 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:45,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:45,686 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:45,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:45,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1645906459, now seen corresponding path program 29 times [2019-11-23 20:21:45,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:45,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091929663] [2019-11-23 20:21:45,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2019-11-23 20:21:46,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091929663] [2019-11-23 20:21:46,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819371944] [2019-11-23 20:21:46,227 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 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 20:21:48,000 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:21:48,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:48,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:21:48,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1249 trivial. 0 not checked. [2019-11-23 20:21:48,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:48,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 63 [2019-11-23 20:21:48,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693224970] [2019-11-23 20:21:48,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-23 20:21:48,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:48,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-23 20:21:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=965, Invalid=2941, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:21:48,743 INFO L87 Difference]: Start difference. First operand 457 states and 645 transitions. Second operand 63 states. [2019-11-23 20:21:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:53,379 INFO L93 Difference]: Finished difference Result 2688 states and 3606 transitions. [2019-11-23 20:21:53,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2019-11-23 20:21:53,379 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 160 [2019-11-23 20:21:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:53,386 INFO L225 Difference]: With dead ends: 2688 [2019-11-23 20:21:53,386 INFO L226 Difference]: Without dead ends: 2286 [2019-11-23 20:21:53,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3440, Invalid=11566, Unknown=0, NotChecked=0, Total=15006 [2019-11-23 20:21:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2019-11-23 20:21:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 483. [2019-11-23 20:21:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2019-11-23 20:21:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 685 transitions. [2019-11-23 20:21:53,414 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 685 transitions. Word has length 160 [2019-11-23 20:21:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:53,414 INFO L462 AbstractCegarLoop]: Abstraction has 483 states and 685 transitions. [2019-11-23 20:21:53,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-23 20:21:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 685 transitions. [2019-11-23 20:21:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-23 20:21:53,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:53,415 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:53,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:53,623 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash -600050359, now seen corresponding path program 30 times [2019-11-23 20:21:53,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:53,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070604141] [2019-11-23 20:21:53,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2019-11-23 20:21:54,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070604141] [2019-11-23 20:21:54,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285562808] [2019-11-23 20:21:54,320 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 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 20:21:58,913 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 20:21:58,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:58,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:21:58,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1337 trivial. 0 not checked. [2019-11-23 20:21:59,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:59,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2019-11-23 20:21:59,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961258373] [2019-11-23 20:21:59,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 20:21:59,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 20:21:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:21:59,326 INFO L87 Difference]: Start difference. First operand 483 states and 685 transitions. Second operand 64 states.