/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-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:38:39,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:38:39,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:38:39,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 20:38:39,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:38:39,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:38:39,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:38:39,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:38:39,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:38:39,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:38:39,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:38:39,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:38:39,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:38:39,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:38:39,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:38:39,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:38:39,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:38:39,602 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 20:38:39,623 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:38:39,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:38:39,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:38:39,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:38:39,627 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:38:39,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:38:39,627 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:38:39,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:38:39,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:38:39,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:38:39,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:38:39,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:38:39,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:38:39,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:38:39,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:38:39,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:38:39,630 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:38:39,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:38:39,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:38:39,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:38:39,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:38:39,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:38:39,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:38:39,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:38:39,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:38:39,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:38:39,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:38:39,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:38:39,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:38:39,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:38:39,903 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:38:39,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:38:39,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:38:39,923 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:38:39,923 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:38:39,924 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-11-23 20:38:40,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0046323af/729f742ad13441868186333e7e816425/FLAG68e7b9741 [2019-11-23 20:38:40,492 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:38:40,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-11-23 20:38:40,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0046323af/729f742ad13441868186333e7e816425/FLAG68e7b9741 [2019-11-23 20:38:40,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0046323af/729f742ad13441868186333e7e816425 [2019-11-23 20:38:40,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:38:40,871 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:38:40,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:40,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:38:40,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:38:40,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:40" (1/1) ... [2019-11-23 20:38:40,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee4f3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:40, skipping insertion in model container [2019-11-23 20:38:40,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:40" (1/1) ... [2019-11-23 20:38:40,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:38:40,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:38:41,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:41,128 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:38:41,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:41,167 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:38:41,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41 WrapperNode [2019-11-23 20:38:41,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:41,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:41,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:38:41,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:38:41,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:41,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:38:41,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:38:41,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:38:41,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (1/1) ... [2019-11-23 20:38:41,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:38:41,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:38:41,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:38:41,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:38:41,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (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 20:38:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:38:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:38:41,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:38:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:38:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:38:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:38:41,623 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:38:41,623 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:38:41,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:41 BoogieIcfgContainer [2019-11-23 20:38:41,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:38:41,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:38:41,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:38:41,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:38:41,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:40" (1/3) ... [2019-11-23 20:38:41,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c6a8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:41, skipping insertion in model container [2019-11-23 20:38:41,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:41" (2/3) ... [2019-11-23 20:38:41,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c6a8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:41, skipping insertion in model container [2019-11-23 20:38:41,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:41" (3/3) ... [2019-11-23 20:38:41,635 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2019-11-23 20:38:41,652 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:38:41,661 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:38:41,675 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:38:41,706 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:38:41,706 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:38:41,706 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:38:41,707 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:38:41,707 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:38:41,707 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:38:41,707 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:38:41,707 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:38:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:38:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:38:41,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:41,734 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:41,734 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash 916381450, now seen corresponding path program 1 times [2019-11-23 20:38:41,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:41,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772299269] [2019-11-23 20:38:41,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:41,872 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 20:38:41,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772299269] [2019-11-23 20:38:41,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:41,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:38:41,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394314908] [2019-11-23 20:38:41,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:38:41,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:38:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:38:41,897 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-23 20:38:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:41,912 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2019-11-23 20:38:41,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:38:41,914 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:38:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:41,922 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:38:41,922 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:38:41,925 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 20:38:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:38:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:38:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:38:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2019-11-23 20:38:41,955 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 8 [2019-11-23 20:38:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:41,956 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2019-11-23 20:38:41,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:38:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2019-11-23 20:38:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:38:41,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:41,957 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:41,957 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash 229281826, now seen corresponding path program 1 times [2019-11-23 20:38:41,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:41,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476622718] [2019-11-23 20:38:41,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:42,014 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 20:38:42,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476622718] [2019-11-23 20:38:42,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:42,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:38:42,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433510257] [2019-11-23 20:38:42,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:38:42,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:42,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:38:42,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:38:42,020 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand 3 states. [2019-11-23 20:38:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:42,096 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-23 20:38:42,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:38:42,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:38:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:42,098 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:38:42,098 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:38:42,099 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 20:38:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:38:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2019-11-23 20:38:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:38:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:38:42,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2019-11-23 20:38:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:42,106 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:38:42,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:38:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:38:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:38:42,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:42,107 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:42,108 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:42,108 INFO L82 PathProgramCache]: Analyzing trace with hash -528137142, now seen corresponding path program 1 times [2019-11-23 20:38:42,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:42,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984974093] [2019-11-23 20:38:42,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:38:42,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984974093] [2019-11-23 20:38:42,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283317736] [2019-11-23 20:38:42,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:38:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:42,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:38:42,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:38:42,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:42,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:38:42,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352758077] [2019-11-23 20:38:42,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:38:42,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:38:42,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:38:42,319 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-11-23 20:38:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:42,418 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-23 20:38:42,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:38:42,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:38:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:42,420 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:38:42,420 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:38:42,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 20:38:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:38:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2019-11-23 20:38:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:38:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2019-11-23 20:38:42,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2019-11-23 20:38:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:42,427 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2019-11-23 20:38:42,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:38:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2019-11-23 20:38:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:38:42,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:42,428 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:42,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:42,633 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1069426978, now seen corresponding path program 2 times [2019-11-23 20:38:42,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:42,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415841964] [2019-11-23 20:38:42,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:38:42,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415841964] [2019-11-23 20:38:42,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477673327] [2019-11-23 20:38:42,772 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 20:38:42,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:42,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:42,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:38:42,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:38:42,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:42,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:38:42,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797227237] [2019-11-23 20:38:42,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:38:42,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:42,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:38:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:38:42,855 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2019-11-23 20:38:42,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:42,972 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2019-11-23 20:38:42,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:38:42,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-23 20:38:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:42,986 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:38:42,986 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:38:42,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 20:38:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:38:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-11-23 20:38:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:38:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-11-23 20:38:42,994 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 24 [2019-11-23 20:38:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:42,994 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-23 20:38:42,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:38:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-11-23 20:38:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:38:42,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:42,996 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:43,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:43,197 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:43,198 INFO L82 PathProgramCache]: Analyzing trace with hash 879812426, now seen corresponding path program 3 times [2019-11-23 20:38:43,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:43,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711399603] [2019-11-23 20:38:43,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:38:43,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711399603] [2019-11-23 20:38:43,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214781327] [2019-11-23 20:38:43,334 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 20:38:43,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:38:43,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:43,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:38:43,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:43,439 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:38:43,440 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,445 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:43,446 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,446 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-11-23 20:38:43,502 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2019-11-23 20:38:43,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,522 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2019-11-23 20:38:43,523 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,575 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:43,582 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:38:43,588 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 40 [2019-11-23 20:38:43,588 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,639 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:43,643 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 3 xjuncts. [2019-11-23 20:38:43,643 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:159, output treesize:108 [2019-11-23 20:38:43,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 20:38:43,747 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2019-11-23 20:38:43,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,762 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2019-11-23 20:38:43,763 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,775 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2019-11-23 20:38:43,776 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,813 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:43,816 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:43,817 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:140, output treesize:3 [2019-11-23 20:38:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:38:43,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:43,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:38:43,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715053061] [2019-11-23 20:38:43,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:38:43,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:38:43,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:38:43,838 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 9 states. [2019-11-23 20:38:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:44,795 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2019-11-23 20:38:44,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:38:44,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-23 20:38:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:44,805 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:38:44,805 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:38:44,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:38:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:38:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2019-11-23 20:38:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:38:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2019-11-23 20:38:44,825 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 32 [2019-11-23 20:38:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:44,826 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2019-11-23 20:38:44,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:38:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2019-11-23 20:38:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:38:44,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:44,831 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:45,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:45,034 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541918, now seen corresponding path program 1 times [2019-11-23 20:38:45,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:45,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741164382] [2019-11-23 20:38:45,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:38:45,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741164382] [2019-11-23 20:38:45,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235388201] [2019-11-23 20:38:45,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:45,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:38:45,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:38:45,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:45,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:38:45,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771446411] [2019-11-23 20:38:45,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:38:45,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:38:45,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:38:45,255 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 8 states. [2019-11-23 20:38:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:45,400 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2019-11-23 20:38:45,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:38:45,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-11-23 20:38:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:45,404 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:38:45,405 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:38:45,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 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 20:38:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:38:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2019-11-23 20:38:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:38:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2019-11-23 20:38:45,421 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 40 [2019-11-23 20:38:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:45,421 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2019-11-23 20:38:45,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:38:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2019-11-23 20:38:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:38:45,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:45,425 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:45,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:45,630 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash 118526412, now seen corresponding path program 2 times [2019-11-23 20:38:45,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:45,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859952297] [2019-11-23 20:38:45,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:38:45,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859952297] [2019-11-23 20:38:45,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698683900] [2019-11-23 20:38:45,749 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:45,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:45,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:45,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:38:45,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:38:45,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:45,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:38:45,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50489956] [2019-11-23 20:38:45,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:38:45,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:45,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:38:45,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:38:45,824 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 9 states. [2019-11-23 20:38:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:45,973 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2019-11-23 20:38:45,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:38:45,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2019-11-23 20:38:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:45,975 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:38:45,975 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:38:45,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:38:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:38:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2019-11-23 20:38:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:38:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2019-11-23 20:38:45,984 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 48 [2019-11-23 20:38:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:45,984 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2019-11-23 20:38:45,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:38:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2019-11-23 20:38:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:38:45,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:45,987 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:46,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:46,198 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1453858974, now seen corresponding path program 3 times [2019-11-23 20:38:46,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:46,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130619073] [2019-11-23 20:38:46,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:38:46,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130619073] [2019-11-23 20:38:46,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177983479] [2019-11-23 20:38:46,301 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 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 20:38:46,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:38:46,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:46,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:38:46,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:38:46,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:46,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:38:46,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591763601] [2019-11-23 20:38:46,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:38:46,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:38:46,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:38:46,408 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 10 states. [2019-11-23 20:38:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:46,548 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2019-11-23 20:38:46,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:38:46,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2019-11-23 20:38:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:46,549 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:38:46,550 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:38:46,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:38:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:38:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2019-11-23 20:38:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:38:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2019-11-23 20:38:46,559 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 56 [2019-11-23 20:38:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:46,559 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2019-11-23 20:38:46,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:38:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2019-11-23 20:38:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:38:46,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:46,561 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:46,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:46,775 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1210542604, now seen corresponding path program 4 times [2019-11-23 20:38:46,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:46,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346782645] [2019-11-23 20:38:46,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:38:46,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346782645] [2019-11-23 20:38:46,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491165209] [2019-11-23 20:38:46,900 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 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 20:38:46,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:46,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:46,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:38:46,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:38:46,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:46,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:38:46,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862182142] [2019-11-23 20:38:46,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:38:46,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:38:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:38:46,981 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 11 states. [2019-11-23 20:38:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:47,128 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2019-11-23 20:38:47,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:38:47,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-11-23 20:38:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:47,131 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:38:47,133 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:38:47,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 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 20:38:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:38:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2019-11-23 20:38:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:38:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2019-11-23 20:38:47,149 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 64 [2019-11-23 20:38:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:47,149 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2019-11-23 20:38:47,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:38:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2019-11-23 20:38:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:38:47,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:47,154 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:47,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:47,355 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash 250261282, now seen corresponding path program 5 times [2019-11-23 20:38:47,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:47,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050223436] [2019-11-23 20:38:47,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-23 20:38:47,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050223436] [2019-11-23 20:38:47,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480101854] [2019-11-23 20:38:47,453 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 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 20:38:47,532 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-23 20:38:47,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:47,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:38:47,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-23 20:38:47,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:47,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:38:47,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500066067] [2019-11-23 20:38:47,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:38:47,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:38:47,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:38:47,561 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 12 states. [2019-11-23 20:38:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:47,755 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2019-11-23 20:38:47,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:38:47,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-11-23 20:38:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:47,757 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:38:47,757 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:38:47,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 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 20:38:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:38:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2019-11-23 20:38:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-23 20:38:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2019-11-23 20:38:47,766 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 72 [2019-11-23 20:38:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:47,766 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2019-11-23 20:38:47,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:38:47,767 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2019-11-23 20:38:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:38:47,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:47,768 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:47,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:47,973 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1756294580, now seen corresponding path program 6 times [2019-11-23 20:38:47,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:47,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359580853] [2019-11-23 20:38:47,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 20:38:48,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359580853] [2019-11-23 20:38:48,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446640474] [2019-11-23 20:38:48,081 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 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 20:38:48,161 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:38:48,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:48,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:38:48,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 20:38:48,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:48,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:38:48,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31831588] [2019-11-23 20:38:48,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:38:48,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:38:48,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:38:48,209 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 13 states. [2019-11-23 20:38:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:48,410 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2019-11-23 20:38:48,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:38:48,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-11-23 20:38:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:48,413 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:38:48,413 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:38:48,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:38:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:38:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2019-11-23 20:38:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:38:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2019-11-23 20:38:48,422 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 80 [2019-11-23 20:38:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:48,422 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2019-11-23 20:38:48,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:38:48,423 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2019-11-23 20:38:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:38:48,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:48,424 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:48,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:48,632 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash 714649314, now seen corresponding path program 7 times [2019-11-23 20:38:48,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:48,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187998442] [2019-11-23 20:38:48,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-11-23 20:38:48,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187998442] [2019-11-23 20:38:48,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795281489] [2019-11-23 20:38:48,761 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 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 20:38:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:48,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:38:48,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 20:38:48,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:48,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:38:48,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278317032] [2019-11-23 20:38:48,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:38:48,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:38:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:38:48,928 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand 14 states. [2019-11-23 20:38:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:49,157 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2019-11-23 20:38:49,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:38:49,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2019-11-23 20:38:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:49,161 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:38:49,161 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:38:49,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 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 20:38:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:38:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2019-11-23 20:38:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 20:38:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2019-11-23 20:38:49,177 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 88 [2019-11-23 20:38:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:49,177 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2019-11-23 20:38:49,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:38:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2019-11-23 20:38:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:38:49,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:49,181 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:49,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:49,382 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash -483292532, now seen corresponding path program 8 times [2019-11-23 20:38:49,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:49,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889498809] [2019-11-23 20:38:49,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2019-11-23 20:38:49,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889498809] [2019-11-23 20:38:49,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401469599] [2019-11-23 20:38:49,527 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 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 20:38:49,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:49,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:49,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:38:49,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 20:38:49,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:49,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:38:49,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627488606] [2019-11-23 20:38:49,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:38:49,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:49,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:38:49,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:38:49,632 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 15 states. [2019-11-23 20:38:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:49,838 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2019-11-23 20:38:49,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:38:49,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2019-11-23 20:38:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:49,839 INFO L225 Difference]: With dead ends: 190 [2019-11-23 20:38:49,839 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:38:49,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 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 20:38:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:38:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2019-11-23 20:38:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:38:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2019-11-23 20:38:49,848 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 96 [2019-11-23 20:38:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:49,848 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2019-11-23 20:38:49,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:38:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2019-11-23 20:38:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:38:49,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:49,851 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:50,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:50,056 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash 457039522, now seen corresponding path program 9 times [2019-11-23 20:38:50,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:50,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293283123] [2019-11-23 20:38:50,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:38:50,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293283123] [2019-11-23 20:38:50,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258903003] [2019-11-23 20:38:50,255 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 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 20:38:50,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-11-23 20:38:50,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:50,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:38:50,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 20:38:50,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:50,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:38:50,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407384846] [2019-11-23 20:38:50,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:38:50,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:50,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:38:50,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:38:50,402 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand 16 states. [2019-11-23 20:38:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:50,617 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2019-11-23 20:38:50,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:38:50,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2019-11-23 20:38:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:50,619 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:38:50,619 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:38:50,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:38:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:38:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2019-11-23 20:38:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-23 20:38:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2019-11-23 20:38:50,626 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 104 [2019-11-23 20:38:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:50,626 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2019-11-23 20:38:50,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:38:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2019-11-23 20:38:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 20:38:50,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:50,628 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:50,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:50,832 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:50,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1888693556, now seen corresponding path program 10 times [2019-11-23 20:38:50,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:50,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426188827] [2019-11-23 20:38:50,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-11-23 20:38:50,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426188827] [2019-11-23 20:38:50,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521908730] [2019-11-23 20:38:50,984 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 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 20:38:51,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:51,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:51,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:38:51,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-23 20:38:51,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:51,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:38:51,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044040192] [2019-11-23 20:38:51,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:38:51,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:38:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:38:51,086 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand 17 states. [2019-11-23 20:38:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:51,358 INFO L93 Difference]: Finished difference Result 218 states and 268 transitions. [2019-11-23 20:38:51,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:38:51,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2019-11-23 20:38:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:51,360 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:38:51,360 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:38:51,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 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 20:38:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:38:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2019-11-23 20:38:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:38:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2019-11-23 20:38:51,367 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 112 [2019-11-23 20:38:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:51,367 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2019-11-23 20:38:51,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:38:51,367 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2019-11-23 20:38:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-23 20:38:51,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:51,369 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:51,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:51,573 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1790328418, now seen corresponding path program 11 times [2019-11-23 20:38:51,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:51,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837185848] [2019-11-23 20:38:51,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-11-23 20:38:51,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837185848] [2019-11-23 20:38:51,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933802358] [2019-11-23 20:38:51,775 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 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 20:38:51,956 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-23 20:38:51,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:51,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:38:51,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-11-23 20:38:51,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:51,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:38:51,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376386785] [2019-11-23 20:38:51,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:38:51,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:38:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:38:51,985 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand 18 states. [2019-11-23 20:38:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:52,247 INFO L93 Difference]: Finished difference Result 232 states and 285 transitions. [2019-11-23 20:38:52,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:38:52,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2019-11-23 20:38:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:52,249 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:38:52,249 INFO L226 Difference]: Without dead ends: 183 [2019-11-23 20:38:52,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 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 20:38:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-23 20:38:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2019-11-23 20:38:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 20:38:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 222 transitions. [2019-11-23 20:38:52,256 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 222 transitions. Word has length 120 [2019-11-23 20:38:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:52,256 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 222 transitions. [2019-11-23 20:38:52,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:38:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 222 transitions. [2019-11-23 20:38:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 20:38:52,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:52,258 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:52,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:52,458 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:52,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:52,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1264129268, now seen corresponding path program 12 times [2019-11-23 20:38:52,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:52,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55948068] [2019-11-23 20:38:52,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 20:38:52,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55948068] [2019-11-23 20:38:52,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977779882] [2019-11-23 20:38:52,645 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 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 20:38:52,904 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 20:38:52,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:52,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:38:52,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 20:38:52,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:52,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:38:52,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955798111] [2019-11-23 20:38:52,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:38:52,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:52,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:38:52,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:38:52,940 INFO L87 Difference]: Start difference. First operand 175 states and 222 transitions. Second operand 19 states. [2019-11-23 20:38:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:53,220 INFO L93 Difference]: Finished difference Result 246 states and 302 transitions. [2019-11-23 20:38:53,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:38:53,221 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2019-11-23 20:38:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:53,223 INFO L225 Difference]: With dead ends: 246 [2019-11-23 20:38:53,223 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 20:38:53,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:38:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 20:38:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2019-11-23 20:38:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 20:38:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 236 transitions. [2019-11-23 20:38:53,231 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 236 transitions. Word has length 128 [2019-11-23 20:38:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:53,231 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 236 transitions. [2019-11-23 20:38:53,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:38:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 236 transitions. [2019-11-23 20:38:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 20:38:53,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:53,233 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:53,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:53,437 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:53,438 INFO L82 PathProgramCache]: Analyzing trace with hash -841101790, now seen corresponding path program 13 times [2019-11-23 20:38:53,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:53,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630999454] [2019-11-23 20:38:53,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-11-23 20:38:53,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630999454] [2019-11-23 20:38:53,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629291196] [2019-11-23 20:38:53,677 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 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 20:38:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:53,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:38:53,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:38:53,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:53,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:38:53,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317468906] [2019-11-23 20:38:53,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:38:53,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:53,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:38:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:38:53,802 INFO L87 Difference]: Start difference. First operand 186 states and 236 transitions. Second operand 20 states. [2019-11-23 20:38:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:54,060 INFO L93 Difference]: Finished difference Result 260 states and 319 transitions. [2019-11-23 20:38:54,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:38:54,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2019-11-23 20:38:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:54,063 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:38:54,063 INFO L226 Difference]: Without dead ends: 205 [2019-11-23 20:38:54,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 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 20:38:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-23 20:38:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2019-11-23 20:38:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 20:38:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 250 transitions. [2019-11-23 20:38:54,071 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 250 transitions. Word has length 136 [2019-11-23 20:38:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:54,072 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 250 transitions. [2019-11-23 20:38:54,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:38:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 250 transitions. [2019-11-23 20:38:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-23 20:38:54,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:54,074 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:54,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:54,282 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1619252044, now seen corresponding path program 14 times [2019-11-23 20:38:54,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:54,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978002647] [2019-11-23 20:38:54,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-11-23 20:38:54,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978002647] [2019-11-23 20:38:54,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555343947] [2019-11-23 20:38:54,517 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 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 20:38:54,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:54,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:54,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:38:54,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-23 20:38:54,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:54,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:38:54,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580617823] [2019-11-23 20:38:54,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:38:54,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:54,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:38:54,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:38:54,621 INFO L87 Difference]: Start difference. First operand 197 states and 250 transitions. Second operand 21 states. [2019-11-23 20:38:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:54,890 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2019-11-23 20:38:54,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:38:54,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2019-11-23 20:38:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:54,892 INFO L225 Difference]: With dead ends: 274 [2019-11-23 20:38:54,892 INFO L226 Difference]: Without dead ends: 216 [2019-11-23 20:38:54,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 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 20:38:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-23 20:38:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2019-11-23 20:38:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-23 20:38:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2019-11-23 20:38:54,899 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 144 [2019-11-23 20:38:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:54,899 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2019-11-23 20:38:54,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:38:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2019-11-23 20:38:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-23 20:38:54,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:54,900 INFO L410 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:55,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:55,106 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash -460288542, now seen corresponding path program 15 times [2019-11-23 20:38:55,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:55,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816920818] [2019-11-23 20:38:55,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:38:55,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816920818] [2019-11-23 20:38:55,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941526513] [2019-11-23 20:38:55,335 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 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 20:38:55,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-11-23 20:38:55,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:55,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:38:55,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-23 20:38:55,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:55,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:38:55,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204071357] [2019-11-23 20:38:55,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:38:55,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:38:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:38:55,590 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand 22 states. [2019-11-23 20:38:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:55,939 INFO L93 Difference]: Finished difference Result 288 states and 353 transitions. [2019-11-23 20:38:55,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:38:55,939 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 152 [2019-11-23 20:38:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:55,941 INFO L225 Difference]: With dead ends: 288 [2019-11-23 20:38:55,942 INFO L226 Difference]: Without dead ends: 227 [2019-11-23 20:38:55,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:38:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-11-23 20:38:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2019-11-23 20:38:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-11-23 20:38:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 278 transitions. [2019-11-23 20:38:55,949 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 278 transitions. Word has length 152 [2019-11-23 20:38:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:55,950 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 278 transitions. [2019-11-23 20:38:55,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:38:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 278 transitions. [2019-11-23 20:38:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-23 20:38:55,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:55,951 INFO L410 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:56,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:56,156 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash -710440052, now seen corresponding path program 16 times [2019-11-23 20:38:56,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:56,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166930515] [2019-11-23 20:38:56,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2019-11-23 20:38:56,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166930515] [2019-11-23 20:38:56,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025415079] [2019-11-23 20:38:56,572 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 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 20:38:56,699 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:56,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:56,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:38:56,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-23 20:38:56,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:56,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:38:56,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141917885] [2019-11-23 20:38:56,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:38:56,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:38:56,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:38:56,766 INFO L87 Difference]: Start difference. First operand 219 states and 278 transitions. Second operand 23 states. [2019-11-23 20:38:57,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:57,217 INFO L93 Difference]: Finished difference Result 302 states and 370 transitions. [2019-11-23 20:38:57,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:38:57,218 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2019-11-23 20:38:57,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:57,219 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:38:57,219 INFO L226 Difference]: Without dead ends: 238 [2019-11-23 20:38:57,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:38:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-11-23 20:38:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2019-11-23 20:38:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-11-23 20:38:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 292 transitions. [2019-11-23 20:38:57,229 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 292 transitions. Word has length 160 [2019-11-23 20:38:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:57,230 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 292 transitions. [2019-11-23 20:38:57,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:38:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 292 transitions. [2019-11-23 20:38:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:38:57,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:57,232 INFO L410 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:57,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:57,438 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash -106267230, now seen corresponding path program 17 times [2019-11-23 20:38:57,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:57,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366349617] [2019-11-23 20:38:57,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-11-23 20:38:57,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366349617] [2019-11-23 20:38:57,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485046382] [2019-11-23 20:38:57,719 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 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 20:38:57,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 20:38:57,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:57,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:38:57,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-11-23 20:38:57,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:57,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:38:57,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019590701] [2019-11-23 20:38:57,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:38:57,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:57,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:38:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:38:57,967 INFO L87 Difference]: Start difference. First operand 230 states and 292 transitions. Second operand 24 states. [2019-11-23 20:38:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:58,381 INFO L93 Difference]: Finished difference Result 316 states and 387 transitions. [2019-11-23 20:38:58,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:38:58,384 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 168 [2019-11-23 20:38:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:58,385 INFO L225 Difference]: With dead ends: 316 [2019-11-23 20:38:58,385 INFO L226 Difference]: Without dead ends: 249 [2019-11-23 20:38:58,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 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 20:38:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-11-23 20:38:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2019-11-23 20:38:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-11-23 20:38:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 306 transitions. [2019-11-23 20:38:58,399 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 306 transitions. Word has length 168 [2019-11-23 20:38:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:58,400 INFO L462 AbstractCegarLoop]: Abstraction has 241 states and 306 transitions. [2019-11-23 20:38:58,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:38:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 306 transitions. [2019-11-23 20:38:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-23 20:38:58,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:58,401 INFO L410 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:58,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:58,606 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash -877259828, now seen corresponding path program 18 times [2019-11-23 20:38:58,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:58,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437143589] [2019-11-23 20:38:58,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2019-11-23 20:38:58,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437143589] [2019-11-23 20:38:58,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848892000] [2019-11-23 20:38:58,917 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 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 20:39:01,121 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-11-23 20:39:01,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:01,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:39:01,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 20:39:01,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:01,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:39:01,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942521849] [2019-11-23 20:39:01,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:39:01,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:01,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:39:01,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:39:01,163 INFO L87 Difference]: Start difference. First operand 241 states and 306 transitions. Second operand 25 states. [2019-11-23 20:39:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:01,654 INFO L93 Difference]: Finished difference Result 330 states and 404 transitions. [2019-11-23 20:39:01,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:39:01,655 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 176 [2019-11-23 20:39:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:01,656 INFO L225 Difference]: With dead ends: 330 [2019-11-23 20:39:01,656 INFO L226 Difference]: Without dead ends: 260 [2019-11-23 20:39:01,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:39:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-11-23 20:39:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 252. [2019-11-23 20:39:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-11-23 20:39:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 320 transitions. [2019-11-23 20:39:01,665 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 320 transitions. Word has length 176 [2019-11-23 20:39:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:01,666 INFO L462 AbstractCegarLoop]: Abstraction has 252 states and 320 transitions. [2019-11-23 20:39:01,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:39:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 320 transitions. [2019-11-23 20:39:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-23 20:39:01,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:01,667 INFO L410 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:01,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:01,874 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1022911134, now seen corresponding path program 19 times [2019-11-23 20:39:01,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:01,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386747333] [2019-11-23 20:39:01,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-11-23 20:39:02,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386747333] [2019-11-23 20:39:02,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917970505] [2019-11-23 20:39:02,211 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 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 20:39:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:39:02,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-23 20:39:02,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:02,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:39:02,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091859791] [2019-11-23 20:39:02,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:39:02,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:39:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:39:02,373 INFO L87 Difference]: Start difference. First operand 252 states and 320 transitions. Second operand 26 states. [2019-11-23 20:39:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:02,756 INFO L93 Difference]: Finished difference Result 344 states and 421 transitions. [2019-11-23 20:39:02,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:39:02,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 184 [2019-11-23 20:39:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:02,758 INFO L225 Difference]: With dead ends: 344 [2019-11-23 20:39:02,759 INFO L226 Difference]: Without dead ends: 271 [2019-11-23 20:39:02,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:39:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-11-23 20:39:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2019-11-23 20:39:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2019-11-23 20:39:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 334 transitions. [2019-11-23 20:39:02,767 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 334 transitions. Word has length 184 [2019-11-23 20:39:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:02,768 INFO L462 AbstractCegarLoop]: Abstraction has 263 states and 334 transitions. [2019-11-23 20:39:02,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:39:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 334 transitions. [2019-11-23 20:39:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-23 20:39:02,769 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:02,770 INFO L410 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:02,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:02,973 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:02,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1353487348, now seen corresponding path program 20 times [2019-11-23 20:39:02,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:02,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562646752] [2019-11-23 20:39:02,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2019-11-23 20:39:03,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562646752] [2019-11-23 20:39:03,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396204654] [2019-11-23 20:39:03,493 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 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 20:39:03,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:03,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:03,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:39:03,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-23 20:39:03,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:03,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:39:03,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559974140] [2019-11-23 20:39:03,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:39:03,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:03,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:39:03,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:39:03,665 INFO L87 Difference]: Start difference. First operand 263 states and 334 transitions. Second operand 27 states. [2019-11-23 20:39:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:04,071 INFO L93 Difference]: Finished difference Result 358 states and 438 transitions. [2019-11-23 20:39:04,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:39:04,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 192 [2019-11-23 20:39:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:04,074 INFO L225 Difference]: With dead ends: 358 [2019-11-23 20:39:04,074 INFO L226 Difference]: Without dead ends: 282 [2019-11-23 20:39:04,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:39:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-11-23 20:39:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 274. [2019-11-23 20:39:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-11-23 20:39:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 348 transitions. [2019-11-23 20:39:04,085 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 348 transitions. Word has length 192 [2019-11-23 20:39:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:04,085 INFO L462 AbstractCegarLoop]: Abstraction has 274 states and 348 transitions. [2019-11-23 20:39:04,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:39:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 348 transitions. [2019-11-23 20:39:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-23 20:39:04,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:04,088 INFO L410 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:04,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,292 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash 562294050, now seen corresponding path program 21 times [2019-11-23 20:39:04,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:04,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492607640] [2019-11-23 20:39:04,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-11-23 20:39:04,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492607640] [2019-11-23 20:39:04,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453508781] [2019-11-23 20:39:04,652 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 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 20:39:05,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-11-23 20:39:05,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:05,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:39:05,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-11-23 20:39:05,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:05,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:39:05,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748468353] [2019-11-23 20:39:05,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:39:05,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:05,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:39:05,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:39:05,980 INFO L87 Difference]: Start difference. First operand 274 states and 348 transitions. Second operand 28 states. [2019-11-23 20:39:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:06,492 INFO L93 Difference]: Finished difference Result 372 states and 455 transitions. [2019-11-23 20:39:06,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:39:06,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 200 [2019-11-23 20:39:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:06,495 INFO L225 Difference]: With dead ends: 372 [2019-11-23 20:39:06,495 INFO L226 Difference]: Without dead ends: 293 [2019-11-23 20:39:06,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:39:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-11-23 20:39:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 285. [2019-11-23 20:39:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-11-23 20:39:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 362 transitions. [2019-11-23 20:39:06,506 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 362 transitions. Word has length 200 [2019-11-23 20:39:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:06,507 INFO L462 AbstractCegarLoop]: Abstraction has 285 states and 362 transitions. [2019-11-23 20:39:06,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:39:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 362 transitions. [2019-11-23 20:39:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-23 20:39:06,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:06,509 INFO L410 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:06,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:06,719 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash -500984756, now seen corresponding path program 22 times [2019-11-23 20:39:06,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:06,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923734691] [2019-11-23 20:39:06,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-11-23 20:39:07,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923734691] [2019-11-23 20:39:07,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500635950] [2019-11-23 20:39:07,198 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 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 20:39:07,280 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:07,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:07,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:39:07,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-23 20:39:07,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:07,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:39:07,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539260255] [2019-11-23 20:39:07,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:39:07,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:07,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:39:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:39:07,349 INFO L87 Difference]: Start difference. First operand 285 states and 362 transitions. Second operand 29 states. [2019-11-23 20:39:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:07,768 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2019-11-23 20:39:07,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:39:07,768 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2019-11-23 20:39:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:07,771 INFO L225 Difference]: With dead ends: 386 [2019-11-23 20:39:07,771 INFO L226 Difference]: Without dead ends: 304 [2019-11-23 20:39:07,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 208 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 20:39:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-11-23 20:39:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 296. [2019-11-23 20:39:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-23 20:39:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 376 transitions. [2019-11-23 20:39:07,778 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 376 transitions. Word has length 208 [2019-11-23 20:39:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:07,779 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 376 transitions. [2019-11-23 20:39:07,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:39:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 376 transitions. [2019-11-23 20:39:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-23 20:39:07,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:07,780 INFO L410 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:07,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:07,984 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -520393502, now seen corresponding path program 23 times [2019-11-23 20:39:07,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:07,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381103438] [2019-11-23 20:39:07,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2019-11-23 20:39:08,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381103438] [2019-11-23 20:39:08,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750682542] [2019-11-23 20:39:08,402 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 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 20:39:08,830 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-11-23 20:39:08,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:08,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:39:08,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-11-23 20:39:08,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:08,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:39:08,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649629513] [2019-11-23 20:39:08,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:39:08,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:08,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:39:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:39:08,913 INFO L87 Difference]: Start difference. First operand 296 states and 376 transitions. Second operand 30 states. [2019-11-23 20:39:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:09,327 INFO L93 Difference]: Finished difference Result 400 states and 489 transitions. [2019-11-23 20:39:09,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:39:09,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 216 [2019-11-23 20:39:09,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:09,330 INFO L225 Difference]: With dead ends: 400 [2019-11-23 20:39:09,330 INFO L226 Difference]: Without dead ends: 315 [2019-11-23 20:39:09,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 216 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 20:39:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-11-23 20:39:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2019-11-23 20:39:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2019-11-23 20:39:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 390 transitions. [2019-11-23 20:39:09,338 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 390 transitions. Word has length 216 [2019-11-23 20:39:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:09,338 INFO L462 AbstractCegarLoop]: Abstraction has 307 states and 390 transitions. [2019-11-23 20:39:09,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:39:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 390 transitions. [2019-11-23 20:39:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-23 20:39:09,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:09,340 INFO L410 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:09,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:09,544 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:09,545 INFO L82 PathProgramCache]: Analyzing trace with hash -87389044, now seen corresponding path program 24 times [2019-11-23 20:39:09,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:09,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26141252] [2019-11-23 20:39:09,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-11-23 20:39:09,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26141252] [2019-11-23 20:39:09,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230806663] [2019-11-23 20:39:09,966 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 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 20:39:16,447 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-11-23 20:39:16,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:16,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:39:16,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-11-23 20:39:16,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:16,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:39:16,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065692538] [2019-11-23 20:39:16,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:39:16,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:39:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:39:16,559 INFO L87 Difference]: Start difference. First operand 307 states and 390 transitions. Second operand 31 states. [2019-11-23 20:39:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:17,024 INFO L93 Difference]: Finished difference Result 414 states and 506 transitions. [2019-11-23 20:39:17,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:39:17,025 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 224 [2019-11-23 20:39:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:17,027 INFO L225 Difference]: With dead ends: 414 [2019-11-23 20:39:17,027 INFO L226 Difference]: Without dead ends: 326 [2019-11-23 20:39:17,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:39:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-11-23 20:39:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2019-11-23 20:39:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2019-11-23 20:39:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 404 transitions. [2019-11-23 20:39:17,036 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 404 transitions. Word has length 224 [2019-11-23 20:39:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:17,036 INFO L462 AbstractCegarLoop]: Abstraction has 318 states and 404 transitions. [2019-11-23 20:39:17,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:39:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 404 transitions. [2019-11-23 20:39:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-23 20:39:17,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:17,038 INFO L410 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:17,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:17,245 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:17,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2018122914, now seen corresponding path program 25 times [2019-11-23 20:39:17,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:17,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83190094] [2019-11-23 20:39:17,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2019-11-23 20:39:17,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83190094] [2019-11-23 20:39:17,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002800286] [2019-11-23 20:39:17,835 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 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 20:39:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:17,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:39:17,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-11-23 20:39:18,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:18,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:39:18,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733380439] [2019-11-23 20:39:18,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:39:18,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:39:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:39:18,004 INFO L87 Difference]: Start difference. First operand 318 states and 404 transitions. Second operand 32 states. [2019-11-23 20:39:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:18,474 INFO L93 Difference]: Finished difference Result 428 states and 523 transitions. [2019-11-23 20:39:18,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:39:18,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 232 [2019-11-23 20:39:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:18,476 INFO L225 Difference]: With dead ends: 428 [2019-11-23 20:39:18,477 INFO L226 Difference]: Without dead ends: 337 [2019-11-23 20:39:18,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:39:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-11-23 20:39:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 329. [2019-11-23 20:39:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-11-23 20:39:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 418 transitions. [2019-11-23 20:39:18,487 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 418 transitions. Word has length 232 [2019-11-23 20:39:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:18,487 INFO L462 AbstractCegarLoop]: Abstraction has 329 states and 418 transitions. [2019-11-23 20:39:18,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:39:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 418 transitions. [2019-11-23 20:39:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-11-23 20:39:18,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:18,490 INFO L410 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:18,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:18,694 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 82597068, now seen corresponding path program 26 times [2019-11-23 20:39:18,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:18,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468235506] [2019-11-23 20:39:18,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2019-11-23 20:39:19,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468235506] [2019-11-23 20:39:19,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874320782] [2019-11-23 20:39:19,191 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 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 20:39:19,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:19,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:19,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:39:19,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-11-23 20:39:19,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:19,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:39:19,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840551741] [2019-11-23 20:39:19,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:39:19,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:39:19,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:39:19,374 INFO L87 Difference]: Start difference. First operand 329 states and 418 transitions. Second operand 33 states. [2019-11-23 20:39:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:19,824 INFO L93 Difference]: Finished difference Result 442 states and 540 transitions. [2019-11-23 20:39:19,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:39:19,825 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 240 [2019-11-23 20:39:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:19,827 INFO L225 Difference]: With dead ends: 442 [2019-11-23 20:39:19,828 INFO L226 Difference]: Without dead ends: 348 [2019-11-23 20:39:19,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:39:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-11-23 20:39:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 340. [2019-11-23 20:39:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2019-11-23 20:39:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 432 transitions. [2019-11-23 20:39:19,835 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 432 transitions. Word has length 240 [2019-11-23 20:39:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:19,836 INFO L462 AbstractCegarLoop]: Abstraction has 340 states and 432 transitions. [2019-11-23 20:39:19,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:39:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 432 transitions. [2019-11-23 20:39:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-11-23 20:39:19,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:19,837 INFO L410 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:20,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:20,041 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash -917767070, now seen corresponding path program 27 times [2019-11-23 20:39:20,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:20,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346341457] [2019-11-23 20:39:20,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2019-11-23 20:39:20,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346341457] [2019-11-23 20:39:20,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970986934] [2019-11-23 20:39:20,529 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 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 20:39:25,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2019-11-23 20:39:25,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:25,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:39:25,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2019-11-23 20:39:25,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:25,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:39:25,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367552143] [2019-11-23 20:39:25,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:39:25,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:39:25,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:39:25,954 INFO L87 Difference]: Start difference. First operand 340 states and 432 transitions. Second operand 34 states. [2019-11-23 20:39:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:26,490 INFO L93 Difference]: Finished difference Result 456 states and 557 transitions. [2019-11-23 20:39:26,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:39:26,490 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 248 [2019-11-23 20:39:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:26,492 INFO L225 Difference]: With dead ends: 456 [2019-11-23 20:39:26,492 INFO L226 Difference]: Without dead ends: 359 [2019-11-23 20:39:26,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:39:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-11-23 20:39:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 351. [2019-11-23 20:39:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-11-23 20:39:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 446 transitions. [2019-11-23 20:39:26,501 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 446 transitions. Word has length 248 [2019-11-23 20:39:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:26,503 INFO L462 AbstractCegarLoop]: Abstraction has 351 states and 446 transitions. [2019-11-23 20:39:26,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:39:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 446 transitions. [2019-11-23 20:39:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-23 20:39:26,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:26,504 INFO L410 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:26,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:26,712 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1054020340, now seen corresponding path program 28 times [2019-11-23 20:39:26,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:26,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610414461] [2019-11-23 20:39:26,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2019-11-23 20:39:27,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610414461] [2019-11-23 20:39:27,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048232511] [2019-11-23 20:39:27,318 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 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 20:39:27,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:27,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:27,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:39:27,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2019-11-23 20:39:27,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:27,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:39:27,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917572446] [2019-11-23 20:39:27,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:39:27,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:27,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:39:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:39:27,489 INFO L87 Difference]: Start difference. First operand 351 states and 446 transitions. Second operand 35 states. [2019-11-23 20:39:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:28,061 INFO L93 Difference]: Finished difference Result 470 states and 574 transitions. [2019-11-23 20:39:28,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:39:28,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 256 [2019-11-23 20:39:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:28,064 INFO L225 Difference]: With dead ends: 470 [2019-11-23 20:39:28,064 INFO L226 Difference]: Without dead ends: 370 [2019-11-23 20:39:28,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:39:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-11-23 20:39:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 362. [2019-11-23 20:39:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2019-11-23 20:39:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 460 transitions. [2019-11-23 20:39:28,072 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 460 transitions. Word has length 256 [2019-11-23 20:39:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:28,072 INFO L462 AbstractCegarLoop]: Abstraction has 362 states and 460 transitions. [2019-11-23 20:39:28,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:39:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 460 transitions. [2019-11-23 20:39:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-11-23 20:39:28,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:28,074 INFO L410 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:28,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:28,278 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:28,278 INFO L82 PathProgramCache]: Analyzing trace with hash -522384350, now seen corresponding path program 29 times [2019-11-23 20:39:28,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:28,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117271355] [2019-11-23 20:39:28,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2019-11-23 20:39:28,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117271355] [2019-11-23 20:39:28,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108884484] [2019-11-23 20:39:28,831 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 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 20:39:29,764 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-23 20:39:29,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:29,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:39:29,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2019-11-23 20:39:29,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:29,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:39:29,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905190249] [2019-11-23 20:39:29,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:39:29,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:29,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:39:29,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:39:29,832 INFO L87 Difference]: Start difference. First operand 362 states and 460 transitions. Second operand 36 states. [2019-11-23 20:39:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:30,395 INFO L93 Difference]: Finished difference Result 484 states and 591 transitions. [2019-11-23 20:39:30,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:39:30,395 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 264 [2019-11-23 20:39:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:30,398 INFO L225 Difference]: With dead ends: 484 [2019-11-23 20:39:30,398 INFO L226 Difference]: Without dead ends: 381 [2019-11-23 20:39:30,399 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:39:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-11-23 20:39:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 373. [2019-11-23 20:39:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2019-11-23 20:39:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 474 transitions. [2019-11-23 20:39:30,407 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 474 transitions. Word has length 264 [2019-11-23 20:39:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:30,408 INFO L462 AbstractCegarLoop]: Abstraction has 373 states and 474 transitions. [2019-11-23 20:39:30,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:39:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 474 transitions. [2019-11-23 20:39:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-11-23 20:39:30,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:30,410 INFO L410 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:30,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:30,615 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash -449817268, now seen corresponding path program 30 times [2019-11-23 20:39:30,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:30,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999253981] [2019-11-23 20:39:30,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2673 trivial. 0 not checked. [2019-11-23 20:39:31,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999253981] [2019-11-23 20:39:31,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682969217] [2019-11-23 20:39:31,268 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 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 20:39:41,849 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-11-23 20:39:41,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:41,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:39:41,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2019-11-23 20:39:41,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:41,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:39:41,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095965625] [2019-11-23 20:39:41,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:39:41,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:39:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:39:41,963 INFO L87 Difference]: Start difference. First operand 373 states and 474 transitions. Second operand 37 states. [2019-11-23 20:39:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:42,507 INFO L93 Difference]: Finished difference Result 498 states and 608 transitions. [2019-11-23 20:39:42,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:39:42,508 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 272 [2019-11-23 20:39:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:42,510 INFO L225 Difference]: With dead ends: 498 [2019-11-23 20:39:42,510 INFO L226 Difference]: Without dead ends: 392 [2019-11-23 20:39:42,511 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:39:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-11-23 20:39:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 384. [2019-11-23 20:39:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2019-11-23 20:39:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 488 transitions. [2019-11-23 20:39:42,518 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 488 transitions. Word has length 272 [2019-11-23 20:39:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:42,519 INFO L462 AbstractCegarLoop]: Abstraction has 384 states and 488 transitions. [2019-11-23 20:39:42,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:39:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 488 transitions. [2019-11-23 20:39:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-23 20:39:42,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:42,520 INFO L410 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:42,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:42,728 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1227273246, now seen corresponding path program 31 times [2019-11-23 20:39:42,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:42,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849458007] [2019-11-23 20:39:42,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2839 trivial. 0 not checked. [2019-11-23 20:39:43,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849458007] [2019-11-23 20:39:43,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107559322] [2019-11-23 20:39:43,303 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 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 20:39:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:43,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:39:43,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2019-11-23 20:39:43,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:43,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:39:43,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89460838] [2019-11-23 20:39:43,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:39:43,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:39:43,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:39:43,499 INFO L87 Difference]: Start difference. First operand 384 states and 488 transitions. Second operand 38 states. [2019-11-23 20:39:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:44,085 INFO L93 Difference]: Finished difference Result 512 states and 625 transitions. [2019-11-23 20:39:44,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:39:44,086 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2019-11-23 20:39:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:44,088 INFO L225 Difference]: With dead ends: 512 [2019-11-23 20:39:44,088 INFO L226 Difference]: Without dead ends: 403 [2019-11-23 20:39:44,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:39:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-11-23 20:39:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 395. [2019-11-23 20:39:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2019-11-23 20:39:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 502 transitions. [2019-11-23 20:39:44,096 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 502 transitions. Word has length 280 [2019-11-23 20:39:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:44,096 INFO L462 AbstractCegarLoop]: Abstraction has 395 states and 502 transitions. [2019-11-23 20:39:44,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:39:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 502 transitions. [2019-11-23 20:39:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-11-23 20:39:44,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:44,098 INFO L410 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:44,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:44,302 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1536855436, now seen corresponding path program 32 times [2019-11-23 20:39:44,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:44,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194817669] [2019-11-23 20:39:44,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3010 trivial. 0 not checked. [2019-11-23 20:39:45,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194817669] [2019-11-23 20:39:45,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466052408] [2019-11-23 20:39:45,043 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 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 20:39:45,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:45,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:45,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:39:45,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2019-11-23 20:39:45,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:45,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:39:45,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325528053] [2019-11-23 20:39:45,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:39:45,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:39:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:39:45,232 INFO L87 Difference]: Start difference. First operand 395 states and 502 transitions. Second operand 39 states. [2019-11-23 20:39:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:45,985 INFO L93 Difference]: Finished difference Result 526 states and 642 transitions. [2019-11-23 20:39:45,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:39:45,986 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 288 [2019-11-23 20:39:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:45,988 INFO L225 Difference]: With dead ends: 526 [2019-11-23 20:39:45,989 INFO L226 Difference]: Without dead ends: 414 [2019-11-23 20:39:45,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:39:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2019-11-23 20:39:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 406. [2019-11-23 20:39:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2019-11-23 20:39:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 516 transitions. [2019-11-23 20:39:46,000 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 516 transitions. Word has length 288 [2019-11-23 20:39:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:46,001 INFO L462 AbstractCegarLoop]: Abstraction has 406 states and 516 transitions. [2019-11-23 20:39:46,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:39:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 516 transitions. [2019-11-23 20:39:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2019-11-23 20:39:46,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:46,005 INFO L410 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:46,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:46,209 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash -300106846, now seen corresponding path program 33 times [2019-11-23 20:39:46,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:46,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587337203] [2019-11-23 20:39:46,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2019-11-23 20:39:47,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587337203] [2019-11-23 20:39:47,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082242656] [2019-11-23 20:39:47,332 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 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 20:39:53,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2019-11-23 20:39:53,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:53,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:39:53,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2019-11-23 20:39:53,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:53,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:39:53,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546282704] [2019-11-23 20:39:53,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:39:53,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:39:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:39:53,518 INFO L87 Difference]: Start difference. First operand 406 states and 516 transitions. Second operand 40 states. [2019-11-23 20:39:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:54,139 INFO L93 Difference]: Finished difference Result 540 states and 659 transitions. [2019-11-23 20:39:54,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:39:54,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 296 [2019-11-23 20:39:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:54,141 INFO L225 Difference]: With dead ends: 540 [2019-11-23 20:39:54,141 INFO L226 Difference]: Without dead ends: 425 [2019-11-23 20:39:54,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:39:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-23 20:39:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 417. [2019-11-23 20:39:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-11-23 20:39:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 530 transitions. [2019-11-23 20:39:54,148 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 530 transitions. Word has length 296 [2019-11-23 20:39:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:54,148 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 530 transitions. [2019-11-23 20:39:54,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:39:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 530 transitions. [2019-11-23 20:39:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-11-23 20:39:54,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:54,151 INFO L410 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:54,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:54,358 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2079353396, now seen corresponding path program 34 times [2019-11-23 20:39:54,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:54,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923987272] [2019-11-23 20:39:54,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3367 trivial. 0 not checked. [2019-11-23 20:39:55,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923987272] [2019-11-23 20:39:55,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485245974] [2019-11-23 20:39:55,028 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 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 20:39:55,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:55,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:55,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:39:55,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2019-11-23 20:39:55,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:55,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:39:55,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98697116] [2019-11-23 20:39:55,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:39:55,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:39:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:39:55,214 INFO L87 Difference]: Start difference. First operand 417 states and 530 transitions. Second operand 41 states. [2019-11-23 20:39:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:55,840 INFO L93 Difference]: Finished difference Result 554 states and 676 transitions. [2019-11-23 20:39:55,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:39:55,840 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 304 [2019-11-23 20:39:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:55,843 INFO L225 Difference]: With dead ends: 554 [2019-11-23 20:39:55,843 INFO L226 Difference]: Without dead ends: 436 [2019-11-23 20:39:55,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:39:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2019-11-23 20:39:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 428. [2019-11-23 20:39:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2019-11-23 20:39:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 544 transitions. [2019-11-23 20:39:55,850 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 544 transitions. Word has length 304 [2019-11-23 20:39:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:55,851 INFO L462 AbstractCegarLoop]: Abstraction has 428 states and 544 transitions. [2019-11-23 20:39:55,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:39:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 544 transitions. [2019-11-23 20:39:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-11-23 20:39:55,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:55,853 INFO L410 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:56,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:56,054 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1803330718, now seen corresponding path program 35 times [2019-11-23 20:39:56,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:56,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124967180] [2019-11-23 20:39:56,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2019-11-23 20:39:56,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124967180] [2019-11-23 20:39:56,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207929924] [2019-11-23 20:39:56,992 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 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 20:39:58,443 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2019-11-23 20:39:58,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:58,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:39:58,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2019-11-23 20:39:58,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:58,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:39:58,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409887912] [2019-11-23 20:39:58,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:39:58,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:58,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:39:58,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:39:58,512 INFO L87 Difference]: Start difference. First operand 428 states and 544 transitions. Second operand 42 states. [2019-11-23 20:39:59,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:59,094 INFO L93 Difference]: Finished difference Result 568 states and 693 transitions. [2019-11-23 20:39:59,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:39:59,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 312 [2019-11-23 20:39:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:59,097 INFO L225 Difference]: With dead ends: 568 [2019-11-23 20:39:59,097 INFO L226 Difference]: Without dead ends: 447 [2019-11-23 20:39:59,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:39:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-23 20:39:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 439. [2019-11-23 20:39:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2019-11-23 20:39:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 558 transitions. [2019-11-23 20:39:59,105 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 558 transitions. Word has length 312 [2019-11-23 20:39:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:59,106 INFO L462 AbstractCegarLoop]: Abstraction has 439 states and 558 transitions. [2019-11-23 20:39:59,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:39:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 558 transitions. [2019-11-23 20:39:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-11-23 20:39:59,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:59,108 INFO L410 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:59,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:59,314 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:59,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1932750348, now seen corresponding path program 36 times [2019-11-23 20:39:59,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:59,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556408753] [2019-11-23 20:39:59,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2019-11-23 20:40:00,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556408753] [2019-11-23 20:40:00,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051359989] [2019-11-23 20:40:00,037 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 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