/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/standard_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:31:31,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:31:31,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:31:31,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:31:31,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:31:31,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:31:31,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:31:31,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:31:31,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:31:31,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:31:31,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:31:31,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:31:31,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:31:31,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:31:31,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:31:31,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:31:31,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:31:31,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:31:31,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:31:31,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:31:31,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:31:31,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:31:31,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:31:31,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:31:31,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:31:31,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:31:31,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:31:31,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:31:31,673 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 20:31:31,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:31:31,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:31:31,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:31:31,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:31:31,703 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:31:31,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:31:31,703 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:31:31,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:31:31,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:31:31,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:31:31,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:31:31,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:31:31,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:31:31,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:31:31,704 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:31:31,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:31:31,705 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:31:31,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:31:31,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:31:31,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:31:31,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:31:31,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:31:31,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:31:31,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:31:31,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:31:31,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:31:31,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:31:31,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:31:31,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:31:31,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:31:31,994 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:31:32,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:31:32,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:31:32,020 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:31:32,020 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:31:32,021 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2019-11-23 20:31:32,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9701b3c39/4ccb05b420a74e6e8a7ac27694d67777/FLAGeeded6fd3 [2019-11-23 20:31:32,564 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:31:32,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2019-11-23 20:31:32,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9701b3c39/4ccb05b420a74e6e8a7ac27694d67777/FLAGeeded6fd3 [2019-11-23 20:31:32,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9701b3c39/4ccb05b420a74e6e8a7ac27694d67777 [2019-11-23 20:31:32,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:31:32,937 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:31:32,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:32,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:31:32,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:31:32,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:32" (1/1) ... [2019-11-23 20:31:32,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ec0c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:32, skipping insertion in model container [2019-11-23 20:31:32,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:32" (1/1) ... [2019-11-23 20:31:32,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:31:32,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:31:33,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:33,145 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:31:33,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:33,188 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:31:33,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33 WrapperNode [2019-11-23 20:31:33,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:33,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:33,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:31:33,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:31:33,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:33,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:31:33,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:31:33,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:31:33,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (1/1) ... [2019-11-23 20:31:33,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:31:33,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:31:33,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:31:33,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:31:33,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (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 20:31:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:31:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:31:33,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:31:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:31:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:31:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:31:33,640 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:31:33,641 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:31:33,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:33 BoogieIcfgContainer [2019-11-23 20:31:33,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:31:33,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:31:33,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:31:33,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:31:33,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:32" (1/3) ... [2019-11-23 20:31:33,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b22c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:33, skipping insertion in model container [2019-11-23 20:31:33,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:33" (2/3) ... [2019-11-23 20:31:33,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b22c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:33, skipping insertion in model container [2019-11-23 20:31:33,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:33" (3/3) ... [2019-11-23 20:31:33,666 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2019-11-23 20:31:33,680 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:31:33,689 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:31:33,710 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:31:33,733 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:31:33,734 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:31:33,734 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:31:33,734 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:31:33,734 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:31:33,734 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:31:33,734 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:31:33,735 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:31:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 20:31:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:33,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:33,758 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:33,759 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2019-11-23 20:31:33,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:33,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844958675] [2019-11-23 20:31:33,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:33,887 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 20:31:33,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844958675] [2019-11-23 20:31:33,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:33,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:31:33,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100879730] [2019-11-23 20:31:33,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:31:33,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:31:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:31:33,913 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-23 20:31:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:33,928 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-11-23 20:31:33,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:31:33,930 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:31:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:33,937 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:31:33,937 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:31:33,941 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 20:31:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:31:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:31:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:31:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:31:33,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2019-11-23 20:31:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:33,979 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:31:33,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:31:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:31:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:33,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:33,980 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:33,980 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2015341610, now seen corresponding path program 1 times [2019-11-23 20:31:33,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:33,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111877703] [2019-11-23 20:31:33,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:34,043 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 20:31:34,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111877703] [2019-11-23 20:31:34,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:34,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:31:34,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776526982] [2019-11-23 20:31:34,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:31:34,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:31:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:31:34,048 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2019-11-23 20:31:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:34,067 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-23 20:31:34,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:31:34,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:31:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:34,069 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:31:34,069 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:31:34,070 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 20:31:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:31:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 20:31:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:31:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 20:31:34,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2019-11-23 20:31:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:34,076 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 20:31:34,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:31:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 20:31:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:31:34,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:34,077 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:34,077 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2019-11-23 20:31:34,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:34,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532394084] [2019-11-23 20:31:34,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:34,134 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 20:31:34,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532394084] [2019-11-23 20:31:34,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:34,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:31:34,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255204040] [2019-11-23 20:31:34,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:31:34,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:31:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:31:34,138 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-23 20:31:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:34,158 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 20:31:34,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:31:34,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:31:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:34,160 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:31:34,160 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:31:34,161 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 20:31:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:31:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-23 20:31:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:31:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:31:34,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-23 20:31:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:34,166 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:31:34,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:31:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:31:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:31:34,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:34,167 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:34,168 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2019-11-23 20:31:34,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:34,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345685403] [2019-11-23 20:31:34,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:34,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345685403] [2019-11-23 20:31:34,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90961905] [2019-11-23 20:31:34,243 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 20:31:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:34,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:31:34,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:34,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:34,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:31:34,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999665791] [2019-11-23 20:31:34,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:31:34,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:34,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:31:34,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:31:34,342 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-23 20:31:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:34,373 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2019-11-23 20:31:34,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:31:34,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:31:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:34,375 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:31:34,375 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:31:34,376 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 20:31:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:31:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 20:31:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:31:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 20:31:34,381 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2019-11-23 20:31:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:34,381 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 20:31:34,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:31:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 20:31:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:31:34,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:34,382 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:34,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:34,586 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1501972051, now seen corresponding path program 2 times [2019-11-23 20:31:34,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:34,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26959420] [2019-11-23 20:31:34,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:34,663 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 20:31:34,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26959420] [2019-11-23 20:31:34,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864638907] [2019-11-23 20:31:34,665 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 20:31:34,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:34,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:34,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:31:34,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:34,746 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 20:31:34,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:34,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:31:34,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694000033] [2019-11-23 20:31:34,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:31:34,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:31:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:31:34,751 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2019-11-23 20:31:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:34,788 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-11-23 20:31:34,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:31:34,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-23 20:31:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:34,792 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:31:34,792 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:31:34,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:31:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:31:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:31:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:31:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-23 20:31:34,802 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2019-11-23 20:31:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:34,803 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-23 20:31:34,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:31:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-23 20:31:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:31:34,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:34,807 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:35,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,022 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:35,023 INFO L82 PathProgramCache]: Analyzing trace with hash -903915691, now seen corresponding path program 3 times [2019-11-23 20:31:35,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:35,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242823286] [2019-11-23 20:31:35,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:35,102 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 20:31:35,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242823286] [2019-11-23 20:31:35,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001228453] [2019-11-23 20:31:35,104 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:31:35,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:35,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:31:35,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:31:35,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:35,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:31:35,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467930247] [2019-11-23 20:31:35,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:31:35,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:31:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:35,202 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 8 states. [2019-11-23 20:31:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:35,277 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-11-23 20:31:35,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:31:35,278 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-23 20:31:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:35,278 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:31:35,279 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:31:35,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:31:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-23 20:31:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:31:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:31:35,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2019-11-23 20:31:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:35,285 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:31:35,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:31:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:31:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:31:35,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:35,286 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:35,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,491 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1422267182, now seen corresponding path program 4 times [2019-11-23 20:31:35,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:35,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927758955] [2019-11-23 20:31:35,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:35,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927758955] [2019-11-23 20:31:35,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495431110] [2019-11-23 20:31:35,583 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,629 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:35,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:35,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:31:35,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:35,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:35,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:31:35,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045453904] [2019-11-23 20:31:35,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:31:35,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:31:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:35,658 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2019-11-23 20:31:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:35,700 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-23 20:31:35,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:31:35,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 20:31:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:35,701 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:31:35,701 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:31:35,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 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 20:31:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:31:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:31:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:31:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:31:35,711 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2019-11-23 20:31:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:35,711 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:31:35,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:31:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:31:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:31:35,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:35,713 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:35,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:35,916 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:35,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2043296748, now seen corresponding path program 5 times [2019-11-23 20:31:35,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:35,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382527152] [2019-11-23 20:31:35,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:36,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382527152] [2019-11-23 20:31:36,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954566831] [2019-11-23 20:31:36,037 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:36,095 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:31:36,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:36,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:31:36,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:31:36,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:36,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:31:36,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886473444] [2019-11-23 20:31:36,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:31:36,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:36,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:31:36,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:36,148 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2019-11-23 20:31:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:36,213 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-11-23 20:31:36,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:31:36,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-23 20:31:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:36,215 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:31:36,215 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:31:36,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:31:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 20:31:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:31:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-23 20:31:36,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2019-11-23 20:31:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:36,224 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-23 20:31:36,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:31:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-23 20:31:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:31:36,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:36,225 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:36,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:36,428 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash -880824069, now seen corresponding path program 6 times [2019-11-23 20:31:36,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:36,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307223041] [2019-11-23 20:31:36,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:31:36,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307223041] [2019-11-23 20:31:36,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802977387] [2019-11-23 20:31:36,565 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:36,629 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:31:36,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:36,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:31:36,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:31:36,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:36,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:31:36,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910241019] [2019-11-23 20:31:36,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:31:36,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:31:36,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:31:36,694 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 13 states. [2019-11-23 20:31:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:36,795 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2019-11-23 20:31:36,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:31:36,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2019-11-23 20:31:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:36,799 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:31:36,799 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:31:36,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:31:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:31:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-23 20:31:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:31:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-11-23 20:31:36,815 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 30 [2019-11-23 20:31:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:36,816 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-11-23 20:31:36,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:31:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-11-23 20:31:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:31:36,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:36,818 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:37,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,026 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:37,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1627529928, now seen corresponding path program 7 times [2019-11-23 20:31:37,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:37,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095220514] [2019-11-23 20:31:37,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:37,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095220514] [2019-11-23 20:31:37,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907642441] [2019-11-23 20:31:37,176 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:37,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:31:37,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:37,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:37,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:31:37,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147555813] [2019-11-23 20:31:37,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:31:37,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:31:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:37,271 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2019-11-23 20:31:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:37,313 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-11-23 20:31:37,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:31:37,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-11-23 20:31:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:37,317 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:31:37,317 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:31:37,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:31:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:31:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:31:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-23 20:31:37,326 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 35 [2019-11-23 20:31:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:37,326 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-23 20:31:37,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:31:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-23 20:31:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:31:37,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:37,327 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:37,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,528 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1639375226, now seen corresponding path program 8 times [2019-11-23 20:31:37,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:37,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141247223] [2019-11-23 20:31:37,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:37,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141247223] [2019-11-23 20:31:37,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771844536] [2019-11-23 20:31:37,678 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:37,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:37,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:31:37,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:37,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:37,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:31:37,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333569597] [2019-11-23 20:31:37,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:31:37,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:31:37,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:31:37,739 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 12 states. [2019-11-23 20:31:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:37,780 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-11-23 20:31:37,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:31:37,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-23 20:31:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:37,782 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:31:37,782 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:31:37,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:31:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:31:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 20:31:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:31:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-11-23 20:31:37,787 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 37 [2019-11-23 20:31:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:37,788 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-11-23 20:31:37,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:31:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-11-23 20:31:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:31:37,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:37,789 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:37,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,999 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1514134844, now seen corresponding path program 9 times [2019-11-23 20:31:37,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:38,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583901676] [2019-11-23 20:31:38,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:38,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583901676] [2019-11-23 20:31:38,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117292732] [2019-11-23 20:31:38,121 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:38,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:31:38,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:38,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:31:38,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:31:38,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:38,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:31:38,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29735954] [2019-11-23 20:31:38,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:31:38,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:38,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:31:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:38,234 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 17 states. [2019-11-23 20:31:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:38,312 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-11-23 20:31:38,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:31:38,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-11-23 20:31:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:38,313 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:31:38,314 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:31:38,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:31:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-11-23 20:31:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:31:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-11-23 20:31:38,319 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2019-11-23 20:31:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:38,320 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-11-23 20:31:38,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:31:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-11-23 20:31:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:31:38,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:38,321 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:38,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:38,529 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash -320565341, now seen corresponding path program 10 times [2019-11-23 20:31:38,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:38,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176560236] [2019-11-23 20:31:38,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:38,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176560236] [2019-11-23 20:31:38,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000660207] [2019-11-23 20:31:38,666 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:38,726 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:38,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:38,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:31:38,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:38,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:38,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:31:38,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48200376] [2019-11-23 20:31:38,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:31:38,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:38,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:31:38,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:31:38,758 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 14 states. [2019-11-23 20:31:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:38,807 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-11-23 20:31:38,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:31:38,807 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-11-23 20:31:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:38,808 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:31:38,809 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:31:38,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:31:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:31:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 20:31:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:31:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-11-23 20:31:38,814 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 44 [2019-11-23 20:31:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:38,814 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-11-23 20:31:38,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:31:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-11-23 20:31:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:31:38,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:38,816 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:39,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:39,030 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1899370075, now seen corresponding path program 11 times [2019-11-23 20:31:39,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:39,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454366296] [2019-11-23 20:31:39,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:39,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454366296] [2019-11-23 20:31:39,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183319421] [2019-11-23 20:31:39,185 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:39,267 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:31:39,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:39,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:31:39,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:39,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:39,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:31:39,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385791311] [2019-11-23 20:31:39,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:31:39,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:31:39,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:39,314 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 15 states. [2019-11-23 20:31:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:39,369 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-11-23 20:31:39,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:31:39,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2019-11-23 20:31:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:39,370 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:31:39,370 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:31:39,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:31:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-23 20:31:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:31:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-11-23 20:31:39,376 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 46 [2019-11-23 20:31:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:39,376 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-11-23 20:31:39,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:31:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-11-23 20:31:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:31:39,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:39,377 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:39,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:39,580 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1287703335, now seen corresponding path program 12 times [2019-11-23 20:31:39,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:39,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929634849] [2019-11-23 20:31:39,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:39,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929634849] [2019-11-23 20:31:39,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791980711] [2019-11-23 20:31:39,777 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:39,960 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:31:39,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:39,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:31:39,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:31:40,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:40,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-23 20:31:40,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988710808] [2019-11-23 20:31:40,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:31:40,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:31:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:31:40,114 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 21 states. [2019-11-23 20:31:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:40,214 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-11-23 20:31:40,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:31:40,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2019-11-23 20:31:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:40,216 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:31:40,216 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:31:40,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:31:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:31:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-11-23 20:31:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:31:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-11-23 20:31:40,226 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 48 [2019-11-23 20:31:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:40,226 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-11-23 20:31:40,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:31:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-11-23 20:31:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:31:40,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:40,233 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:40,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,439 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1180415388, now seen corresponding path program 13 times [2019-11-23 20:31:40,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:40,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171930582] [2019-11-23 20:31:40,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:40,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171930582] [2019-11-23 20:31:40,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464168331] [2019-11-23 20:31:40,600 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:40,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:31:40,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:40,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:40,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:31:40,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868460415] [2019-11-23 20:31:40,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:31:40,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:31:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:40,690 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 17 states. [2019-11-23 20:31:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:40,736 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2019-11-23 20:31:40,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:31:40,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2019-11-23 20:31:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:40,737 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:31:40,737 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:31:40,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:31:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:31:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-23 20:31:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:31:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-23 20:31:40,743 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 53 [2019-11-23 20:31:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:40,743 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-23 20:31:40,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:31:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-23 20:31:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:31:40,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:40,744 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:40,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:40,948 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1334936102, now seen corresponding path program 14 times [2019-11-23 20:31:40,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:40,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004938074] [2019-11-23 20:31:40,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:41,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004938074] [2019-11-23 20:31:41,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124854784] [2019-11-23 20:31:41,162 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:41,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:41,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:41,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:41,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:31:41,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772001756] [2019-11-23 20:31:41,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:31:41,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:31:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:31:41,284 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 18 states. [2019-11-23 20:31:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,370 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-11-23 20:31:41,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:31:41,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-11-23 20:31:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,373 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:31:41,373 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:31:41,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:31:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:31:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-23 20:31:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:31:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-11-23 20:31:41,384 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 55 [2019-11-23 20:31:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,385 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-11-23 20:31:41,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:31:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-11-23 20:31:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:31:41,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,387 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,591 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash -521130344, now seen corresponding path program 15 times [2019-11-23 20:31:41,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225371541] [2019-11-23 20:31:41,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:41,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225371541] [2019-11-23 20:31:41,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645408364] [2019-11-23 20:31:41,794 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:31:41,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:41,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:31:41,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:41,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-23 20:31:41,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108779203] [2019-11-23 20:31:41,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:31:41,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:31:41,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:31:41,963 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 25 states. [2019-11-23 20:31:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,087 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2019-11-23 20:31:42,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:31:42,088 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2019-11-23 20:31:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,089 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:31:42,090 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:31:42,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:31:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:31:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2019-11-23 20:31:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:31:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2019-11-23 20:31:42,100 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 57 [2019-11-23 20:31:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,100 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2019-11-23 20:31:42,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:31:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2019-11-23 20:31:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:31:42,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,101 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,305 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash -230545713, now seen corresponding path program 16 times [2019-11-23 20:31:42,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430267895] [2019-11-23 20:31:42,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:42,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430267895] [2019-11-23 20:31:42,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910513896] [2019-11-23 20:31:42,503 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:42,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:42,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:42,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:31:42,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233730146] [2019-11-23 20:31:42,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:31:42,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:31:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:31:42,590 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 20 states. [2019-11-23 20:31:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,650 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2019-11-23 20:31:42,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:31:42,650 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-11-23 20:31:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,650 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:31:42,651 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:31:42,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:31:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:31:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-11-23 20:31:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:31:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2019-11-23 20:31:42,655 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 62 [2019-11-23 20:31:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,655 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2019-11-23 20:31:42,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:31:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2019-11-23 20:31:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:31:42,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,657 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,861 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1184482385, now seen corresponding path program 17 times [2019-11-23 20:31:42,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909816947] [2019-11-23 20:31:42,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:43,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909816947] [2019-11-23 20:31:43,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764773866] [2019-11-23 20:31:43,067 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,301 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:31:43,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:43,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:31:43,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:43,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:43,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:31:43,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770366603] [2019-11-23 20:31:43,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:31:43,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:31:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:31:43,326 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 21 states. [2019-11-23 20:31:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:43,402 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2019-11-23 20:31:43,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:31:43,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2019-11-23 20:31:43,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:43,404 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:31:43,405 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:31:43,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:31:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:31:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-11-23 20:31:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:31:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-11-23 20:31:43,409 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 64 [2019-11-23 20:31:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:43,409 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-11-23 20:31:43,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:31:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-11-23 20:31:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:31:43,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:43,410 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:43,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,611 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash -478148269, now seen corresponding path program 18 times [2019-11-23 20:31:43,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:43,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027080568] [2019-11-23 20:31:43,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:43,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027080568] [2019-11-23 20:31:43,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288169707] [2019-11-23 20:31:43,828 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,992 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:31:43,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:43,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:31:43,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:31:44,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:44,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2019-11-23 20:31:44,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002416184] [2019-11-23 20:31:44,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:31:44,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:31:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:44,118 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 29 states. [2019-11-23 20:31:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:44,308 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2019-11-23 20:31:44,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:31:44,310 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2019-11-23 20:31:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:44,311 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:31:44,311 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:31:44,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:31:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-11-23 20:31:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:31:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2019-11-23 20:31:44,315 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 66 [2019-11-23 20:31:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:44,315 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2019-11-23 20:31:44,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:31:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2019-11-23 20:31:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:31:44,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:44,316 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:44,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:44,521 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -937261968, now seen corresponding path program 19 times [2019-11-23 20:31:44,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:44,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529908417] [2019-11-23 20:31:44,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:44,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529908417] [2019-11-23 20:31:44,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775082389] [2019-11-23 20:31:44,778 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:44,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:31:44,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:44,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:44,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:31:44,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472879377] [2019-11-23 20:31:44,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:31:44,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:31:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:31:44,855 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 23 states. [2019-11-23 20:31:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:44,921 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2019-11-23 20:31:44,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:31:44,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2019-11-23 20:31:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:44,923 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:31:44,923 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:31:44,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:31:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:31:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-11-23 20:31:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:31:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2019-11-23 20:31:44,927 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 71 [2019-11-23 20:31:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:44,927 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2019-11-23 20:31:44,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:31:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2019-11-23 20:31:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:31:44,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:44,928 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:45,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:45,132 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:45,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2102851886, now seen corresponding path program 20 times [2019-11-23 20:31:45,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:45,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130523320] [2019-11-23 20:31:45,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:45,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130523320] [2019-11-23 20:31:45,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644345862] [2019-11-23 20:31:45,431 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:45,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:45,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:45,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:31:45,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:45,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:45,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:31:45,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754365690] [2019-11-23 20:31:45,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:31:45,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:45,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:31:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:31:45,522 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 24 states. [2019-11-23 20:31:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:45,597 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-11-23 20:31:45,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:31:45,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2019-11-23 20:31:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:45,599 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:31:45,599 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:31:45,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:31:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:31:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-11-23 20:31:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:31:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2019-11-23 20:31:45,603 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 73 [2019-11-23 20:31:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:45,603 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2019-11-23 20:31:45,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:31:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2019-11-23 20:31:45,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:31:45,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:45,604 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:45,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:45,808 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1220462996, now seen corresponding path program 21 times [2019-11-23 20:31:45,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:45,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341301930] [2019-11-23 20:31:45,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:46,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341301930] [2019-11-23 20:31:46,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805240969] [2019-11-23 20:31:46,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:46,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:31:46,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:46,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:31:46,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:31:46,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:46,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2019-11-23 20:31:46,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892382873] [2019-11-23 20:31:46,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:31:46,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:46,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:31:46,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:31:46,279 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 33 states. [2019-11-23 20:31:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:46,490 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2019-11-23 20:31:46,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:31:46,491 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2019-11-23 20:31:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:46,492 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:31:46,492 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:31:46,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:31:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:31:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-11-23 20:31:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:31:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2019-11-23 20:31:46,496 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 75 [2019-11-23 20:31:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:46,496 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2019-11-23 20:31:46,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:31:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2019-11-23 20:31:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:31:46,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:46,497 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:46,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:46,701 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:46,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1973722629, now seen corresponding path program 22 times [2019-11-23 20:31:46,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:46,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828978123] [2019-11-23 20:31:46,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:46,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828978123] [2019-11-23 20:31:46,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447439209] [2019-11-23 20:31:46,998 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:47,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:47,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:47,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:31:47,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 20:31:47,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:47,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 35 [2019-11-23 20:31:47,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191673545] [2019-11-23 20:31:47,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:31:47,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:31:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:31:47,296 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 35 states. [2019-11-23 20:31:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:47,493 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2019-11-23 20:31:47,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:31:47,494 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2019-11-23 20:31:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:47,494 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:31:47,495 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:31:47,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:31:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:31:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2019-11-23 20:31:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:31:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2019-11-23 20:31:47,499 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 80 [2019-11-23 20:31:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:47,499 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2019-11-23 20:31:47,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:31:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2019-11-23 20:31:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:31:47,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:47,500 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:47,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:47,704 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1099741624, now seen corresponding path program 23 times [2019-11-23 20:31:47,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:47,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212241687] [2019-11-23 20:31:47,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:48,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212241687] [2019-11-23 20:31:48,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075599562] [2019-11-23 20:31:48,025 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:49,409 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:31:49,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:49,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:31:49,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:49,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:49,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:31:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324534576] [2019-11-23 20:31:49,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:31:49,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:31:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:31:49,435 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 27 states. [2019-11-23 20:31:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:49,546 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2019-11-23 20:31:49,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:31:49,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 85 [2019-11-23 20:31:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:49,548 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:31:49,548 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:31:49,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:31:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:31:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2019-11-23 20:31:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:31:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2019-11-23 20:31:49,552 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 85 [2019-11-23 20:31:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:49,552 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2019-11-23 20:31:49,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:31:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2019-11-23 20:31:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:31:49,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:49,553 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:49,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:49,759 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1705350790, now seen corresponding path program 24 times [2019-11-23 20:31:49,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:49,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740492885] [2019-11-23 20:31:49,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:50,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740492885] [2019-11-23 20:31:50,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912857560] [2019-11-23 20:31:50,087 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:50,565 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:31:50,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:50,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:31:50,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 20:31:50,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:50,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2019-11-23 20:31:50,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574276130] [2019-11-23 20:31:50,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:31:50,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:50,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:31:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:31:50,757 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 38 states. [2019-11-23 20:31:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:50,916 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2019-11-23 20:31:50,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:31:50,916 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 87 [2019-11-23 20:31:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:50,917 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:31:50,917 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:31:50,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:31:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:31:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2019-11-23 20:31:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:31:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2019-11-23 20:31:50,921 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 87 [2019-11-23 20:31:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:50,921 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2019-11-23 20:31:50,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:31:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2019-11-23 20:31:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-23 20:31:50,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:50,922 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:51,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:51,125 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash -923623263, now seen corresponding path program 25 times [2019-11-23 20:31:51,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:51,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880082758] [2019-11-23 20:31:51,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:51,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880082758] [2019-11-23 20:31:51,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385678267] [2019-11-23 20:31:51,500 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:51,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:31:51,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:51,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:51,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:31:51,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669736683] [2019-11-23 20:31:51,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:31:51,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:51,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:31:51,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:51,618 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 29 states. [2019-11-23 20:31:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:51,709 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2019-11-23 20:31:51,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:31:51,709 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2019-11-23 20:31:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:51,711 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:31:51,711 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:31:51,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:31:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:31:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-23 20:31:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:31:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2019-11-23 20:31:51,715 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 92 [2019-11-23 20:31:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:51,715 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2019-11-23 20:31:51,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:31:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2019-11-23 20:31:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 20:31:51,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:51,716 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:51,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:51,920 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1945162077, now seen corresponding path program 26 times [2019-11-23 20:31:51,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:51,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717217732] [2019-11-23 20:31:51,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:52,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717217732] [2019-11-23 20:31:52,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716559492] [2019-11-23 20:31:52,300 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:52,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:52,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:52,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:31:52,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:52,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:52,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:31:52,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78985548] [2019-11-23 20:31:52,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:31:52,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:31:52,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:31:52,384 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 30 states. [2019-11-23 20:31:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:52,490 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2019-11-23 20:31:52,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:31:52,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2019-11-23 20:31:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:52,491 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:31:52,491 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:31:52,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:31:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:31:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-23 20:31:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:31:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2019-11-23 20:31:52,496 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 94 [2019-11-23 20:31:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:52,496 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2019-11-23 20:31:52,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:31:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2019-11-23 20:31:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:31:52,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:52,498 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:52,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:52,701 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash -96451547, now seen corresponding path program 27 times [2019-11-23 20:31:52,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:52,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846212063] [2019-11-23 20:31:52,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:53,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846212063] [2019-11-23 20:31:53,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448384758] [2019-11-23 20:31:53,129 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:53,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:31:53,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:53,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:31:53,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 53 proven. 176 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 20:31:53,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:53,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2019-11-23 20:31:53,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567967739] [2019-11-23 20:31:53,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:31:53,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:31:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:31:53,484 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 44 states. [2019-11-23 20:31:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:53,914 INFO L93 Difference]: Finished difference Result 150 states and 180 transitions. [2019-11-23 20:31:53,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:31:53,915 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2019-11-23 20:31:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:53,916 INFO L225 Difference]: With dead ends: 150 [2019-11-23 20:31:53,916 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 20:31:53,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=2314, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:31:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 20:31:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2019-11-23 20:31:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 20:31:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2019-11-23 20:31:53,921 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 96 [2019-11-23 20:31:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:53,922 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2019-11-23 20:31:53,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:31:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2019-11-23 20:31:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:31:53,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:53,923 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:54,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:54,127 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash 758715420, now seen corresponding path program 28 times [2019-11-23 20:31:54,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:54,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775454763] [2019-11-23 20:31:54,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:54,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775454763] [2019-11-23 20:31:54,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650985008] [2019-11-23 20:31:54,553 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:54,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:54,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:54,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:31:54,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:54,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:54,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:31:54,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861987589] [2019-11-23 20:31:54,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:31:54,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:31:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:31:54,644 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand 33 states. [2019-11-23 20:31:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:54,748 INFO L93 Difference]: Finished difference Result 154 states and 182 transitions. [2019-11-23 20:31:54,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:31:54,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 103 [2019-11-23 20:31:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:54,749 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:31:54,749 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:31:54,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:31:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:31:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2019-11-23 20:31:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:31:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2019-11-23 20:31:54,754 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 103 [2019-11-23 20:31:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:54,754 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2019-11-23 20:31:54,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:31:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2019-11-23 20:31:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:31:54,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:54,755 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:54,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:54,958 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash 968560858, now seen corresponding path program 29 times [2019-11-23 20:31:54,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:54,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834842966] [2019-11-23 20:31:54,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:55,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834842966] [2019-11-23 20:31:55,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257592096] [2019-11-23 20:31:55,564 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:56,713 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-23 20:31:56,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:56,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:31:56,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 20:31:56,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:56,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2019-11-23 20:31:56,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257757589] [2019-11-23 20:31:56,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:31:56,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:31:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:31:56,992 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 46 states. [2019-11-23 20:31:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:57,243 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2019-11-23 20:31:57,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:31:57,244 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 105 [2019-11-23 20:31:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:57,245 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:31:57,245 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:31:57,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:31:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:31:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2019-11-23 20:31:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 20:31:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2019-11-23 20:31:57,250 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 105 [2019-11-23 20:31:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:57,250 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2019-11-23 20:31:57,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:31:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2019-11-23 20:31:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-23 20:31:57,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:57,251 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:57,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:57,453 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash 677460301, now seen corresponding path program 30 times [2019-11-23 20:31:57,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:57,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702551984] [2019-11-23 20:31:57,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:31:58,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702551984] [2019-11-23 20:31:58,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135119392] [2019-11-23 20:31:58,068 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:59,439 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-11-23 20:31:59,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:59,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:31:59,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-23 20:31:59,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:59,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 16] total 48 [2019-11-23 20:31:59,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579992317] [2019-11-23 20:31:59,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:31:59,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:31:59,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1576, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:31:59,872 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand 48 states. [2019-11-23 20:32:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:00,094 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2019-11-23 20:32:00,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:32:00,096 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 110 [2019-11-23 20:32:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:00,097 INFO L225 Difference]: With dead ends: 169 [2019-11-23 20:32:00,097 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:32:00,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=680, Invalid=1576, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:32:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:32:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2019-11-23 20:32:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 20:32:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2019-11-23 20:32:00,103 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 110 [2019-11-23 20:32:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:00,103 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2019-11-23 20:32:00,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:32:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2019-11-23 20:32:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:32:00,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:00,104 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:00,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:00,305 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash -574769866, now seen corresponding path program 31 times [2019-11-23 20:32:00,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:00,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639605040] [2019-11-23 20:32:00,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:32:00,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639605040] [2019-11-23 20:32:00,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723284549] [2019-11-23 20:32:00,935 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:01,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:32:01,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:32:01,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:01,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:32:01,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707851658] [2019-11-23 20:32:01,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:32:01,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:32:01,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:32:01,034 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand 36 states. [2019-11-23 20:32:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:01,149 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2019-11-23 20:32:01,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:32:01,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 115 [2019-11-23 20:32:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:01,150 INFO L225 Difference]: With dead ends: 172 [2019-11-23 20:32:01,150 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:32:01,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:32:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:32:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-11-23 20:32:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:32:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2019-11-23 20:32:01,153 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 115 [2019-11-23 20:32:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:01,153 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2019-11-23 20:32:01,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:32:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2019-11-23 20:32:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:32:01,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:01,154 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:01,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:01,355 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash 811894004, now seen corresponding path program 32 times [2019-11-23 20:32:01,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:01,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118512839] [2019-11-23 20:32:01,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:32:02,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118512839] [2019-11-23 20:32:02,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033278735] [2019-11-23 20:32:02,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:02,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:02,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:02,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:32:02,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:32:02,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:02,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:32:02,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361823766] [2019-11-23 20:32:02,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:32:02,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:32:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:32:02,302 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand 37 states. [2019-11-23 20:32:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:02,465 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2019-11-23 20:32:02,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:32:02,466 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 117 [2019-11-23 20:32:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:02,467 INFO L225 Difference]: With dead ends: 174 [2019-11-23 20:32:02,467 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:32:02,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:32:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:32:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 20:32:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 20:32:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2019-11-23 20:32:02,474 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 117 [2019-11-23 20:32:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:02,475 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2019-11-23 20:32:02,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:32:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2019-11-23 20:32:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:32:02,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:02,476 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:02,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:02,683 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1956011314, now seen corresponding path program 33 times [2019-11-23 20:32:02,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:02,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221832295] [2019-11-23 20:32:02,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:32:03,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221832295] [2019-11-23 20:32:03,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075353412] [2019-11-23 20:32:03,326 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:03,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:32:03,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:03,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:32:03,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 67 proven. 287 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-11-23 20:32:03,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:03,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 19] total 54 [2019-11-23 20:32:03,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256584361] [2019-11-23 20:32:03,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:32:03,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:03,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:32:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=1986, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:32:03,974 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand 54 states. [2019-11-23 20:32:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:04,651 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2019-11-23 20:32:04,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:32:04,651 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 119 [2019-11-23 20:32:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:04,652 INFO L225 Difference]: With dead ends: 182 [2019-11-23 20:32:04,652 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:32:04,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1146, Invalid=3546, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 20:32:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:32:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2019-11-23 20:32:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:32:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2019-11-23 20:32:04,660 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 119 [2019-11-23 20:32:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:04,661 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2019-11-23 20:32:04,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:32:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2019-11-23 20:32:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 20:32:04,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:04,663 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:04,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:04,868 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash 618383479, now seen corresponding path program 34 times [2019-11-23 20:32:04,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:04,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425963664] [2019-11-23 20:32:04,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1626 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:32:05,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425963664] [2019-11-23 20:32:05,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599871920] [2019-11-23 20:32:05,657 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:32:05,735 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:05,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:05,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:32:05,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1626 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:32:05,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:05,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:32:05,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828289090] [2019-11-23 20:32:05,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:32:05,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:32:05,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:32:05,764 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand 40 states. [2019-11-23 20:32:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:05,897 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2019-11-23 20:32:05,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:32:05,898 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 126 [2019-11-23 20:32:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:05,899 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:32:05,899 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 20:32:05,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:32:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 20:32:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-11-23 20:32:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 20:32:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2019-11-23 20:32:05,904 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 126 [2019-11-23 20:32:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:05,905 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2019-11-23 20:32:05,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:32:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2019-11-23 20:32:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 20:32:05,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:05,906 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:06,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:06,109 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash 688281081, now seen corresponding path program 35 times [2019-11-23 20:32:06,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:06,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075413470] [2019-11-23 20:32:06,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:32:07,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075413470] [2019-11-23 20:32:07,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954021844] [2019-11-23 20:32:07,137 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:11,602 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2019-11-23 20:32:11,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:11,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:32:11,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 20:32:12,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:12,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 18] total 56 [2019-11-23 20:32:12,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487058280] [2019-11-23 20:32:12,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:32:12,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:32:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=2148, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:32:12,241 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand 56 states. [2019-11-23 20:32:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:12,621 INFO L93 Difference]: Finished difference Result 193 states and 230 transitions. [2019-11-23 20:32:12,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:32:12,622 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 128 [2019-11-23 20:32:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:12,623 INFO L225 Difference]: With dead ends: 193 [2019-11-23 20:32:12,623 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:32:12,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=932, Invalid=2148, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:32:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:32:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2019-11-23 20:32:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:32:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2019-11-23 20:32:12,633 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 128 [2019-11-23 20:32:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:12,634 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2019-11-23 20:32:12,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:32:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2019-11-23 20:32:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:32:12,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:12,636 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:12,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:12,847 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:12,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:12,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1438042742, now seen corresponding path program 36 times [2019-11-23 20:32:12,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:12,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597500503] [2019-11-23 20:32:12,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:13,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597500503] [2019-11-23 20:32:13,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511007303] [2019-11-23 20:32:13,661 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:26,052 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2019-11-23 20:32:26,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:26,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:32:26,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2019-11-23 20:32:26,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:26,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 19] total 58 [2019-11-23 20:32:26,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863814832] [2019-11-23 20:32:26,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 20:32:26,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 20:32:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=2316, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:32:26,485 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand 58 states. [2019-11-23 20:32:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:26,795 INFO L93 Difference]: Finished difference Result 201 states and 240 transitions. [2019-11-23 20:32:26,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:32:26,796 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 133 [2019-11-23 20:32:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:26,797 INFO L225 Difference]: With dead ends: 201 [2019-11-23 20:32:26,797 INFO L226 Difference]: Without dead ends: 144 [2019-11-23 20:32:26,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=2316, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:32:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-23 20:32:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2019-11-23 20:32:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-23 20:32:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2019-11-23 20:32:26,803 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 133 [2019-11-23 20:32:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:26,803 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2019-11-23 20:32:26,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 20:32:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2019-11-23 20:32:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-23 20:32:26,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:26,804 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:27,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:27,005 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1517117341, now seen corresponding path program 37 times [2019-11-23 20:32:27,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:27,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089820707] [2019-11-23 20:32:27,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:27,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089820707] [2019-11-23 20:32:27,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955405234] [2019-11-23 20:32:27,763 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:27,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:32:27,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:27,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:27,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:32:27,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585821357] [2019-11-23 20:32:27,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:32:27,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:27,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:32:27,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:32:27,879 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand 43 states. [2019-11-23 20:32:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:28,003 INFO L93 Difference]: Finished difference Result 204 states and 242 transitions. [2019-11-23 20:32:28,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:32:28,003 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 138 [2019-11-23 20:32:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:28,005 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:32:28,005 INFO L226 Difference]: Without dead ends: 144 [2019-11-23 20:32:28,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:32:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-23 20:32:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2019-11-23 20:32:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 20:32:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2019-11-23 20:32:28,010 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 138 [2019-11-23 20:32:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:28,010 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2019-11-23 20:32:28,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:32:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2019-11-23 20:32:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 20:32:28,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:28,011 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:28,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:28,215 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1196049889, now seen corresponding path program 38 times [2019-11-23 20:32:28,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:28,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658032732] [2019-11-23 20:32:28,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:29,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658032732] [2019-11-23 20:32:29,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924250642] [2019-11-23 20:32:29,141 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:29,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:29,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:29,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:32:29,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:29,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:29,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 20:32:29,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187329282] [2019-11-23 20:32:29,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:32:29,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:29,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:32:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:32:29,277 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand 44 states. [2019-11-23 20:32:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:29,436 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2019-11-23 20:32:29,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:32:29,436 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 140 [2019-11-23 20:32:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:29,437 INFO L225 Difference]: With dead ends: 206 [2019-11-23 20:32:29,438 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 20:32:29,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:32:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 20:32:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-11-23 20:32:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-23 20:32:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 164 transitions. [2019-11-23 20:32:29,442 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 164 transitions. Word has length 140 [2019-11-23 20:32:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:29,442 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 164 transitions. [2019-11-23 20:32:29,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:32:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 164 transitions. [2019-11-23 20:32:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-23 20:32:29,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:29,443 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:29,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:29,647 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1504609247, now seen corresponding path program 39 times [2019-11-23 20:32:29,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:29,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466672425] [2019-11-23 20:32:29,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:30,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466672425] [2019-11-23 20:32:30,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322095615] [2019-11-23 20:32:30,372 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:30,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 20:32:30,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:30,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:32:30,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 81 proven. 425 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 20:32:31,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:31,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 22] total 64 [2019-11-23 20:32:31,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869961469] [2019-11-23 20:32:31,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 20:32:31,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 20:32:31,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=2808, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:32:31,222 INFO L87 Difference]: Start difference. First operand 145 states and 164 transitions. Second operand 64 states. [2019-11-23 20:32:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:32,150 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2019-11-23 20:32:32,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-23 20:32:32,151 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 142 [2019-11-23 20:32:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:32,152 INFO L225 Difference]: With dead ends: 214 [2019-11-23 20:32:32,152 INFO L226 Difference]: Without dead ends: 154 [2019-11-23 20:32:32,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1602, Invalid=5040, Unknown=0, NotChecked=0, Total=6642 [2019-11-23 20:32:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-11-23 20:32:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2019-11-23 20:32:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 20:32:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2019-11-23 20:32:32,158 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 142 [2019-11-23 20:32:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:32,158 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2019-11-23 20:32:32,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 20:32:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2019-11-23 20:32:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 20:32:32,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:32,159 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:32,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:32,363 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 869953952, now seen corresponding path program 40 times [2019-11-23 20:32:32,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:32,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059553719] [2019-11-23 20:32:32,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2326 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 20:32:33,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059553719] [2019-11-23 20:32:33,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683444461] [2019-11-23 20:32:33,168 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:33,261 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:33,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:33,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:32:33,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2326 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2019-11-23 20:32:33,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:33,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 21] total 65 [2019-11-23 20:32:33,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290508972] [2019-11-23 20:32:33,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 20:32:33,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 20:32:33,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1244, Invalid=2916, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:32:33,777 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand 65 states. [2019-11-23 20:32:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:34,128 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2019-11-23 20:32:34,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-23 20:32:34,128 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 149 [2019-11-23 20:32:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:34,129 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:32:34,129 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:32:34,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1244, Invalid=2916, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:32:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:32:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2019-11-23 20:32:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-23 20:32:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2019-11-23 20:32:34,134 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 149 [2019-11-23 20:32:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:34,135 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2019-11-23 20:32:34,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 20:32:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2019-11-23 20:32:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-23 20:32:34,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:34,136 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:34,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:34,339 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash -782606393, now seen corresponding path program 41 times [2019-11-23 20:32:34,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:34,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116905676] [2019-11-23 20:32:34,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:32:35,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116905676] [2019-11-23 20:32:35,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153646678] [2019-11-23 20:32:35,402 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:45,567 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2019-11-23 20:32:45,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:45,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:32:45,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2019-11-23 20:32:46,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:46,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 22] total 67 [2019-11-23 20:32:46,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205681233] [2019-11-23 20:32:46,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-11-23 20:32:46,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:46,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-11-23 20:32:46,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1311, Invalid=3111, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 20:32:46,081 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand 67 states. [2019-11-23 20:32:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:46,387 INFO L93 Difference]: Finished difference Result 231 states and 276 transitions. [2019-11-23 20:32:46,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-11-23 20:32:46,388 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 154 [2019-11-23 20:32:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:46,389 INFO L225 Difference]: With dead ends: 231 [2019-11-23 20:32:46,389 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:32:46,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1311, Invalid=3111, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 20:32:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:32:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2019-11-23 20:32:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:32:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2019-11-23 20:32:46,394 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 154 [2019-11-23 20:32:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:46,395 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2019-11-23 20:32:46,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-11-23 20:32:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2019-11-23 20:32:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:32:46,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:46,396 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:46,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:46,606 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1760747388, now seen corresponding path program 42 times [2019-11-23 20:32:46,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:46,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667686521] [2019-11-23 20:32:46,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:32:47,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667686521] [2019-11-23 20:32:47,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805642055] [2019-11-23 20:32:47,629 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,802 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2019-11-23 20:32:58,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:58,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:32:58,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2019-11-23 20:32:59,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:59,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 23] total 69 [2019-11-23 20:32:59,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922933952] [2019-11-23 20:32:59,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-23 20:32:59,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-23 20:32:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 20:32:59,475 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 69 states. [2019-11-23 20:32:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:59,920 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2019-11-23 20:32:59,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-23 20:32:59,921 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 159 [2019-11-23 20:32:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:59,922 INFO L225 Difference]: With dead ends: 239 [2019-11-23 20:32:59,923 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:32:59,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 20:32:59,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:32:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2019-11-23 20:32:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-23 20:32:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2019-11-23 20:32:59,930 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 159 [2019-11-23 20:32:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:59,931 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2019-11-23 20:32:59,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-23 20:32:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2019-11-23 20:32:59,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 20:32:59,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:59,932 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:00,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:00,142 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:00,143 INFO L82 PathProgramCache]: Analyzing trace with hash 872774123, now seen corresponding path program 43 times [2019-11-23 20:33:00,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:00,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613830532] [2019-11-23 20:33:00,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:33:01,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613830532] [2019-11-23 20:33:01,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204722905] [2019-11-23 20:33:01,181 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:01,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 20:33:01,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:33:01,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:01,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2019-11-23 20:33:01,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583824820] [2019-11-23 20:33:01,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:33:01,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:01,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:33:01,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:33:01,335 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand 50 states. [2019-11-23 20:33:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:01,492 INFO L93 Difference]: Finished difference Result 242 states and 288 transitions. [2019-11-23 20:33:01,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:33:01,492 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 164 [2019-11-23 20:33:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:01,493 INFO L225 Difference]: With dead ends: 242 [2019-11-23 20:33:01,493 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:33:01,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:33:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:33:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-11-23 20:33:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-23 20:33:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 192 transitions. [2019-11-23 20:33:01,498 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 192 transitions. Word has length 164 [2019-11-23 20:33:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:01,498 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 192 transitions. [2019-11-23 20:33:01,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:33:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 192 transitions. [2019-11-23 20:33:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:33:01,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:01,499 INFO L410 BasicCegarLoop]: trace histogram [47, 47, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:01,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:01,703 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1666962925, now seen corresponding path program 44 times [2019-11-23 20:33:01,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:01,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920058866] [2019-11-23 20:33:01,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2860 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:33:02,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920058866] [2019-11-23 20:33:02,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666114189] [2019-11-23 20:33:02,644 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:02,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:02,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:02,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:33:02,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2860 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:33:02,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:02,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2019-11-23 20:33:02,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756509813] [2019-11-23 20:33:02,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:33:02,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:33:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:33:02,786 INFO L87 Difference]: Start difference. First operand 169 states and 192 transitions. Second operand 51 states. [2019-11-23 20:33:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:02,966 INFO L93 Difference]: Finished difference Result 244 states and 290 transitions. [2019-11-23 20:33:02,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:33:02,966 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 166 [2019-11-23 20:33:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:02,968 INFO L225 Difference]: With dead ends: 244 [2019-11-23 20:33:02,968 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:33:02,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:33:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:33:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2019-11-23 20:33:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-23 20:33:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 194 transitions. [2019-11-23 20:33:02,973 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 194 transitions. Word has length 166 [2019-11-23 20:33:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:02,973 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 194 transitions. [2019-11-23 20:33:02,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:33:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 194 transitions. [2019-11-23 20:33:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:33:02,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:02,974 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:03,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:03,178 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:03,179 INFO L82 PathProgramCache]: Analyzing trace with hash 378222959, now seen corresponding path program 45 times [2019-11-23 20:33:03,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:03,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268110684] [2019-11-23 20:33:03,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2955 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:33:04,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268110684] [2019-11-23 20:33:04,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643865196] [2019-11-23 20:33:04,164 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:05,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 20:33:05,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:05,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:33:05,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2955 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2019-11-23 20:33:05,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:05,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 24] total 73 [2019-11-23 20:33:05,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413046382] [2019-11-23 20:33:05,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-23 20:33:05,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:05,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-23 20:33:05,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1550, Invalid=3706, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 20:33:05,620 INFO L87 Difference]: Start difference. First operand 171 states and 194 transitions. Second operand 73 states. [2019-11-23 20:33:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:05,998 INFO L93 Difference]: Finished difference Result 251 states and 300 transitions. [2019-11-23 20:33:05,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-11-23 20:33:05,999 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 168 [2019-11-23 20:33:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:06,000 INFO L225 Difference]: With dead ends: 251 [2019-11-23 20:33:06,000 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 20:33:06,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1550, Invalid=3706, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 20:33:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 20:33:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2019-11-23 20:33:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 20:33:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2019-11-23 20:33:06,006 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 168 [2019-11-23 20:33:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:06,006 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2019-11-23 20:33:06,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-23 20:33:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2019-11-23 20:33:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 20:33:06,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:06,008 INFO L410 BasicCegarLoop]: trace histogram [49, 49, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:06,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:06,212 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:06,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1178337364, now seen corresponding path program 46 times [2019-11-23 20:33:06,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:06,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201345406] [2019-11-23 20:33:06,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 20:33:07,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201345406] [2019-11-23 20:33:07,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881265486] [2019-11-23 20:33:07,203 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:07,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:07,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:07,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-23 20:33:07,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 20:33:07,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:07,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2019-11-23 20:33:07,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125500347] [2019-11-23 20:33:07,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 20:33:07,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 20:33:07,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:33:07,346 INFO L87 Difference]: Start difference. First operand 176 states and 200 transitions. Second operand 53 states. [2019-11-23 20:33:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:07,546 INFO L93 Difference]: Finished difference Result 254 states and 302 transitions. [2019-11-23 20:33:07,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:33:07,547 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 173 [2019-11-23 20:33:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:07,548 INFO L225 Difference]: With dead ends: 254 [2019-11-23 20:33:07,548 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 20:33:07,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:33:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 20:33:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-11-23 20:33:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 20:33:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 202 transitions. [2019-11-23 20:33:07,552 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 202 transitions. Word has length 173 [2019-11-23 20:33:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:07,553 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 202 transitions. [2019-11-23 20:33:07,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 20:33:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 202 transitions. [2019-11-23 20:33:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 20:33:07,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:07,554 INFO L410 BasicCegarLoop]: trace histogram [50, 50, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:07,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:07,758 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:07,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1155532434, now seen corresponding path program 47 times [2019-11-23 20:33:07,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:07,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258811278] [2019-11-23 20:33:07,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat