/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:53:11,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:53:11,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:53:11,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 14:53:11,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:53:11,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:53:11,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:53:11,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:53:11,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:53:11,982 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:53:11,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:53:11,983 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:53:11,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:53:11,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:53:11,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:53:11,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:53:11,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:53:11,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:53:11,986 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:53:11,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:53:11,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:53:11,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:53:11,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:53:11,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:53:11,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:53:11,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:53:11,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:53:11,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:53:11,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:53:11,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:53:11,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:53:11,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:53:11,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:53:11,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:53:11,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:53:12,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:53:12,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:53:12,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:53:12,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:53:12,309 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:53:12,309 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition03-1.c [2020-08-21 14:53:12,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edf7ec437/9ac2b50912544800acc70b91a7a8c51d/FLAG4a3c972fd [2020-08-21 14:53:12,839 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:53:12,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Addition03-1.c [2020-08-21 14:53:12,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edf7ec437/9ac2b50912544800acc70b91a7a8c51d/FLAG4a3c972fd [2020-08-21 14:53:13,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edf7ec437/9ac2b50912544800acc70b91a7a8c51d [2020-08-21 14:53:13,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:53:13,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:53:13,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:53:13,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:53:13,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:53:13,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387f035d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13, skipping insertion in model container [2020-08-21 14:53:13,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:53:13,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:53:13,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:53:13,470 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:53:13,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:53:13,507 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:53:13,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13 WrapperNode [2020-08-21 14:53:13,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:53:13,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:53:13,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:53:13,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:53:13,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... [2020-08-21 14:53:13,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:53:13,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:53:13,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:53:13,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:53:13,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 14:53:13,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:53:13,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:53:13,695 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-08-21 14:53:13,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-08-21 14:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:53:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:53:13,903 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:53:13,904 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:53:13,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:53:13 BoogieIcfgContainer [2020-08-21 14:53:13,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:53:13,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:53:13,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:53:13,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:53:13,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:53:13" (1/3) ... [2020-08-21 14:53:13,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fc536e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:53:13, skipping insertion in model container [2020-08-21 14:53:13,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:53:13" (2/3) ... [2020-08-21 14:53:13,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fc536e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:53:13, skipping insertion in model container [2020-08-21 14:53:13,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:53:13" (3/3) ... [2020-08-21 14:53:13,918 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2020-08-21 14:53:13,930 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:53:13,939 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:53:13,987 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:53:14,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:53:14,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:53:14,047 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:53:14,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:53:14,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:53:14,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:53:14,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:53:14,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:53:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-21 14:53:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 14:53:14,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1540493149, now seen corresponding path program 1 times [2020-08-21 14:53:14,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793337004] [2020-08-21 14:53:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:14,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793337004] [2020-08-21 14:53:14,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:53:14,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:53:14,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40937774] [2020-08-21 14:53:14,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:53:14,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:53:14,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:53:14,347 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-21 14:53:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:14,476 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-08-21 14:53:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:53:14,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 14:53:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:14,489 INFO L225 Difference]: With dead ends: 36 [2020-08-21 14:53:14,490 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 14:53:14,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:53:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 14:53:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-21 14:53:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 14:53:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-08-21 14:53:14,545 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2020-08-21 14:53:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:14,546 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-08-21 14:53:14,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:53:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-08-21 14:53:14,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 14:53:14,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:53:14,550 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1700112874, now seen corresponding path program 1 times [2020-08-21 14:53:14,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908712291] [2020-08-21 14:53:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:53:14,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908712291] [2020-08-21 14:53:14,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:53:14,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:53:14,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743542020] [2020-08-21 14:53:14,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:53:14,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:14,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:53:14,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:53:14,630 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 4 states. [2020-08-21 14:53:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:14,662 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-08-21 14:53:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:53:14,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-08-21 14:53:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:14,664 INFO L225 Difference]: With dead ends: 32 [2020-08-21 14:53:14,664 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 14:53:14,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:53:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 14:53:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-08-21 14:53:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 14:53:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-21 14:53:14,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-08-21 14:53:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:14,676 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-21 14:53:14,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:53:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-21 14:53:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:53:14,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:53:14,678 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash -35294164, now seen corresponding path program 1 times [2020-08-21 14:53:14,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62401044] [2020-08-21 14:53:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:53:14,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62401044] [2020-08-21 14:53:14,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:14,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 14:53:14,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868903762] [2020-08-21 14:53:14,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:53:14,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:53:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:53:14,811 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-08-21 14:53:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:14,904 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-21 14:53:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:53:14,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 14:53:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:14,906 INFO L225 Difference]: With dead ends: 29 [2020-08-21 14:53:14,906 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 14:53:14,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:53:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 14:53:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 14:53:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 14:53:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-21 14:53:14,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 20 [2020-08-21 14:53:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:14,915 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-21 14:53:14,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:53:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-21 14:53:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:53:14,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:14,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:14,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:53:14,918 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:14,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1261456781, now seen corresponding path program 2 times [2020-08-21 14:53:14,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:14,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453962333] [2020-08-21 14:53:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:14,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-21 14:53:15,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453962333] [2020-08-21 14:53:15,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:15,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:53:15,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146126670] [2020-08-21 14:53:15,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:53:15,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:15,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:53:15,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:53:15,070 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 7 states. [2020-08-21 14:53:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:15,223 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-08-21 14:53:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:53:15,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 14:53:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:15,226 INFO L225 Difference]: With dead ends: 43 [2020-08-21 14:53:15,226 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 14:53:15,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:53:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 14:53:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 14:53:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 14:53:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-21 14:53:15,238 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 27 [2020-08-21 14:53:15,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:15,239 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-21 14:53:15,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:53:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-21 14:53:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 14:53:15,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:15,241 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:15,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:53:15,241 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:15,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:15,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2131329174, now seen corresponding path program 3 times [2020-08-21 14:53:15,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:15,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316509624] [2020-08-21 14:53:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:53:15,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316509624] [2020-08-21 14:53:15,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:15,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:53:15,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537185346] [2020-08-21 14:53:15,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:53:15,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:15,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:53:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:53:15,386 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 8 states. [2020-08-21 14:53:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:15,530 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-08-21 14:53:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:53:15,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-21 14:53:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:15,532 INFO L225 Difference]: With dead ends: 46 [2020-08-21 14:53:15,533 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 14:53:15,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:53:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 14:53:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 14:53:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 14:53:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2020-08-21 14:53:15,545 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 34 [2020-08-21 14:53:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:15,545 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2020-08-21 14:53:15,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:53:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2020-08-21 14:53:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 14:53:15,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:15,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:15,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:53:15,548 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash -867295607, now seen corresponding path program 4 times [2020-08-21 14:53:15,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:15,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497364932] [2020-08-21 14:53:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-21 14:53:15,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497364932] [2020-08-21 14:53:15,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:15,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:53:15,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565523194] [2020-08-21 14:53:15,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:53:15,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:53:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:53:15,774 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand 9 states. [2020-08-21 14:53:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:15,999 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-08-21 14:53:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:53:15,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-21 14:53:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:16,001 INFO L225 Difference]: With dead ends: 49 [2020-08-21 14:53:16,001 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 14:53:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:53:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 14:53:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 14:53:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 14:53:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-08-21 14:53:16,012 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 41 [2020-08-21 14:53:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:16,013 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-08-21 14:53:16,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:53:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-08-21 14:53:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 14:53:16,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:16,015 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:16,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:53:16,016 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash -943688704, now seen corresponding path program 5 times [2020-08-21 14:53:16,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:16,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383954950] [2020-08-21 14:53:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 14:53:16,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383954950] [2020-08-21 14:53:16,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:16,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:53:16,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944008981] [2020-08-21 14:53:16,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:53:16,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:16,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:53:16,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:53:16,206 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 10 states. [2020-08-21 14:53:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:16,374 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2020-08-21 14:53:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:53:16,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-08-21 14:53:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:16,376 INFO L225 Difference]: With dead ends: 52 [2020-08-21 14:53:16,377 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 14:53:16,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:53:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 14:53:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 14:53:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 14:53:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-08-21 14:53:16,387 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 48 [2020-08-21 14:53:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:16,387 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-08-21 14:53:16,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:53:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-08-21 14:53:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 14:53:16,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:16,390 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:16,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:53:16,390 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1959654303, now seen corresponding path program 6 times [2020-08-21 14:53:16,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:16,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049466142] [2020-08-21 14:53:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-08-21 14:53:16,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049466142] [2020-08-21 14:53:16,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:16,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:53:16,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100573240] [2020-08-21 14:53:16,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:53:16,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:53:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:53:16,596 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 11 states. [2020-08-21 14:53:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:16,783 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-08-21 14:53:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:53:16,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-08-21 14:53:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:16,785 INFO L225 Difference]: With dead ends: 55 [2020-08-21 14:53:16,785 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 14:53:16,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:53:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 14:53:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 14:53:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 14:53:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-08-21 14:53:16,794 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 55 [2020-08-21 14:53:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:16,795 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-08-21 14:53:16,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:53:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-08-21 14:53:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 14:53:16,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:16,797 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:16,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:53:16,797 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash 75083370, now seen corresponding path program 7 times [2020-08-21 14:53:16,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:16,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563480284] [2020-08-21 14:53:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:16,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-08-21 14:53:17,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563480284] [2020-08-21 14:53:17,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:17,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:53:17,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430471400] [2020-08-21 14:53:17,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:53:17,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:17,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:53:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:53:17,076 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 12 states. [2020-08-21 14:53:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:17,263 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-08-21 14:53:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:53:17,263 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-08-21 14:53:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:17,265 INFO L225 Difference]: With dead ends: 58 [2020-08-21 14:53:17,265 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 14:53:17,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:53:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 14:53:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 14:53:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 14:53:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-08-21 14:53:17,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 62 [2020-08-21 14:53:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:17,274 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-08-21 14:53:17,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:53:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-08-21 14:53:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 14:53:17,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:17,276 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:17,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:53:17,276 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash 980406709, now seen corresponding path program 8 times [2020-08-21 14:53:17,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:17,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322916812] [2020-08-21 14:53:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-08-21 14:53:17,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322916812] [2020-08-21 14:53:17,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:17,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:53:17,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605796867] [2020-08-21 14:53:17,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:53:17,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:17,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:53:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:53:17,619 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 13 states. [2020-08-21 14:53:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:17,854 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-08-21 14:53:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:53:17,855 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-08-21 14:53:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:17,856 INFO L225 Difference]: With dead ends: 61 [2020-08-21 14:53:17,857 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 14:53:17,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:53:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 14:53:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 14:53:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 14:53:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-08-21 14:53:17,878 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 69 [2020-08-21 14:53:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:17,879 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-08-21 14:53:17,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:53:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-08-21 14:53:17,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-21 14:53:17,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:17,882 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:17,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:53:17,883 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:17,884 INFO L82 PathProgramCache]: Analyzing trace with hash -654012460, now seen corresponding path program 9 times [2020-08-21 14:53:17,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:17,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049766802] [2020-08-21 14:53:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:17,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-21 14:53:18,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049766802] [2020-08-21 14:53:18,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:18,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:53:18,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479225654] [2020-08-21 14:53:18,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:53:18,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:53:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:53:18,315 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 14 states. [2020-08-21 14:53:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:18,520 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-08-21 14:53:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:53:18,520 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-08-21 14:53:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:18,521 INFO L225 Difference]: With dead ends: 64 [2020-08-21 14:53:18,522 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 14:53:18,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:53:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 14:53:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 14:53:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 14:53:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-08-21 14:53:18,535 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 76 [2020-08-21 14:53:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:18,535 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-08-21 14:53:18,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:53:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-08-21 14:53:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:53:18,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:18,540 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:18,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:53:18,540 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1057728309, now seen corresponding path program 10 times [2020-08-21 14:53:18,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:18,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693840288] [2020-08-21 14:53:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-08-21 14:53:18,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693840288] [2020-08-21 14:53:18,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:18,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 14:53:18,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167997600] [2020-08-21 14:53:18,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:53:18,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:18,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:53:18,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:53:18,955 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 15 states. [2020-08-21 14:53:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:19,191 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-08-21 14:53:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 14:53:19,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-21 14:53:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:19,193 INFO L225 Difference]: With dead ends: 67 [2020-08-21 14:53:19,193 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 14:53:19,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:53:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 14:53:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 14:53:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 14:53:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-08-21 14:53:19,212 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 83 [2020-08-21 14:53:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:19,213 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-08-21 14:53:19,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:53:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-08-21 14:53:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-21 14:53:19,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:19,215 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:19,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:53:19,216 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2104461250, now seen corresponding path program 11 times [2020-08-21 14:53:19,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:19,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698231457] [2020-08-21 14:53:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-08-21 14:53:19,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698231457] [2020-08-21 14:53:19,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:19,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:53:19,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481704305] [2020-08-21 14:53:19,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:53:19,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:53:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:53:19,736 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 16 states. [2020-08-21 14:53:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:19,965 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-08-21 14:53:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:53:19,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-08-21 14:53:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:19,966 INFO L225 Difference]: With dead ends: 70 [2020-08-21 14:53:19,966 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 14:53:19,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:53:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 14:53:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 14:53:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 14:53:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-08-21 14:53:19,976 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 90 [2020-08-21 14:53:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:19,977 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-08-21 14:53:19,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:53:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-08-21 14:53:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 14:53:19,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:19,980 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:19,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:53:19,980 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash 565979361, now seen corresponding path program 12 times [2020-08-21 14:53:19,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:19,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811581752] [2020-08-21 14:53:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-08-21 14:53:20,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811581752] [2020-08-21 14:53:20,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:20,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 14:53:20,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332324864] [2020-08-21 14:53:20,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 14:53:20,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:20,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 14:53:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:53:20,541 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 17 states. [2020-08-21 14:53:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:20,789 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-08-21 14:53:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 14:53:20,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-08-21 14:53:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:20,791 INFO L225 Difference]: With dead ends: 73 [2020-08-21 14:53:20,791 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 14:53:20,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-21 14:53:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 14:53:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 14:53:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 14:53:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2020-08-21 14:53:20,798 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 97 [2020-08-21 14:53:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:20,799 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2020-08-21 14:53:20,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 14:53:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2020-08-21 14:53:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 14:53:20,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:20,800 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:20,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:53:20,800 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash -106117208, now seen corresponding path program 13 times [2020-08-21 14:53:20,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:20,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736036792] [2020-08-21 14:53:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-08-21 14:53:21,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736036792] [2020-08-21 14:53:21,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:21,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 14:53:21,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956508143] [2020-08-21 14:53:21,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 14:53:21,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:21,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 14:53:21,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:53:21,348 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand 18 states. [2020-08-21 14:53:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:21,614 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-08-21 14:53:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:53:21,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2020-08-21 14:53:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:21,616 INFO L225 Difference]: With dead ends: 76 [2020-08-21 14:53:21,616 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 14:53:21,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-21 14:53:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 14:53:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 14:53:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 14:53:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-08-21 14:53:21,624 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 104 [2020-08-21 14:53:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:21,624 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-08-21 14:53:21,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 14:53:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-08-21 14:53:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-21 14:53:21,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:21,626 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:21,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:53:21,626 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1237836279, now seen corresponding path program 14 times [2020-08-21 14:53:21,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:21,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697268374] [2020-08-21 14:53:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:21,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 14:53:22,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697268374] [2020-08-21 14:53:22,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:22,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 14:53:22,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241376884] [2020-08-21 14:53:22,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 14:53:22,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 14:53:22,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:53:22,228 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 19 states. [2020-08-21 14:53:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:22,549 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-08-21 14:53:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 14:53:22,550 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-08-21 14:53:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:22,551 INFO L225 Difference]: With dead ends: 79 [2020-08-21 14:53:22,552 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 14:53:22,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 14:53:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 14:53:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 14:53:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 14:53:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-08-21 14:53:22,561 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 111 [2020-08-21 14:53:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:22,561 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-08-21 14:53:22,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 14:53:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-08-21 14:53:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-21 14:53:22,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:22,564 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:22,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:53:22,564 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash 340319762, now seen corresponding path program 15 times [2020-08-21 14:53:22,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:22,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342446964] [2020-08-21 14:53:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:22,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-08-21 14:53:23,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342446964] [2020-08-21 14:53:23,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:23,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 14:53:23,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796159031] [2020-08-21 14:53:23,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 14:53:23,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 14:53:23,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:53:23,197 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 20 states. [2020-08-21 14:53:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:23,509 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-08-21 14:53:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:53:23,510 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2020-08-21 14:53:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:23,511 INFO L225 Difference]: With dead ends: 82 [2020-08-21 14:53:23,511 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 14:53:23,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 14:53:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 14:53:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 14:53:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 14:53:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-08-21 14:53:23,517 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 118 [2020-08-21 14:53:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:23,518 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-08-21 14:53:23,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 14:53:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-08-21 14:53:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 14:53:23,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:23,519 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:23,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:53:23,520 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1471685645, now seen corresponding path program 16 times [2020-08-21 14:53:23,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:23,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448478935] [2020-08-21 14:53:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:23,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-08-21 14:53:24,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448478935] [2020-08-21 14:53:24,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:24,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 14:53:24,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123794653] [2020-08-21 14:53:24,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 14:53:24,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:24,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 14:53:24,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 14:53:24,203 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 21 states. [2020-08-21 14:53:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:24,519 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-08-21 14:53:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 14:53:24,519 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-08-21 14:53:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:24,520 INFO L225 Difference]: With dead ends: 85 [2020-08-21 14:53:24,520 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 14:53:24,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 14:53:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 14:53:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 14:53:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 14:53:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-08-21 14:53:24,528 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 125 [2020-08-21 14:53:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:24,528 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-08-21 14:53:24,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 14:53:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-08-21 14:53:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 14:53:24,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:24,530 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:24,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:53:24,530 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:24,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:24,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1481368708, now seen corresponding path program 17 times [2020-08-21 14:53:24,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:24,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626774172] [2020-08-21 14:53:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:24,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-08-21 14:53:25,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626774172] [2020-08-21 14:53:25,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:25,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 14:53:25,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015884874] [2020-08-21 14:53:25,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 14:53:25,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 14:53:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:53:25,414 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 22 states. [2020-08-21 14:53:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:25,824 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-21 14:53:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:53:25,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2020-08-21 14:53:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:25,826 INFO L225 Difference]: With dead ends: 88 [2020-08-21 14:53:25,826 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 14:53:25,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 14:53:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 14:53:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 14:53:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 14:53:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-08-21 14:53:25,834 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 132 [2020-08-21 14:53:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:25,835 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-08-21 14:53:25,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 14:53:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-08-21 14:53:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 14:53:25,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:25,837 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:25,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:53:25,837 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash -103968989, now seen corresponding path program 18 times [2020-08-21 14:53:25,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:25,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501475444] [2020-08-21 14:53:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:25,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-08-21 14:53:26,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501475444] [2020-08-21 14:53:26,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:26,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 14:53:26,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963603111] [2020-08-21 14:53:26,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 14:53:26,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 14:53:26,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:53:26,972 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 23 states. [2020-08-21 14:53:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:27,317 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-08-21 14:53:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 14:53:27,318 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-08-21 14:53:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:27,319 INFO L225 Difference]: With dead ends: 91 [2020-08-21 14:53:27,319 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 14:53:27,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 14:53:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 14:53:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 14:53:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 14:53:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2020-08-21 14:53:27,327 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 139 [2020-08-21 14:53:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:27,327 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2020-08-21 14:53:27,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 14:53:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2020-08-21 14:53:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 14:53:27,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:27,329 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:27,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:53:27,329 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1432494106, now seen corresponding path program 19 times [2020-08-21 14:53:27,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:27,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363854631] [2020-08-21 14:53:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:27,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-08-21 14:53:28,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363854631] [2020-08-21 14:53:28,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:28,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 14:53:28,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439612582] [2020-08-21 14:53:28,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 14:53:28,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 14:53:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:53:28,489 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 24 states. [2020-08-21 14:53:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:28,867 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-08-21 14:53:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 14:53:28,867 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2020-08-21 14:53:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:28,870 INFO L225 Difference]: With dead ends: 94 [2020-08-21 14:53:28,870 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 14:53:28,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 14:53:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 14:53:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 14:53:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 14:53:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-08-21 14:53:28,879 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 146 [2020-08-21 14:53:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:28,880 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-08-21 14:53:28,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 14:53:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-08-21 14:53:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-21 14:53:28,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:28,882 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:28,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:53:28,882 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash -873938119, now seen corresponding path program 20 times [2020-08-21 14:53:28,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:28,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339120316] [2020-08-21 14:53:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:28,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-08-21 14:53:29,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339120316] [2020-08-21 14:53:29,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:29,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 14:53:29,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697664372] [2020-08-21 14:53:29,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 14:53:29,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 14:53:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:53:29,956 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 25 states. [2020-08-21 14:53:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:30,355 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-08-21 14:53:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 14:53:30,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2020-08-21 14:53:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:30,359 INFO L225 Difference]: With dead ends: 97 [2020-08-21 14:53:30,359 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 14:53:30,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 14:53:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 14:53:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-21 14:53:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 14:53:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2020-08-21 14:53:30,372 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 153 [2020-08-21 14:53:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:30,374 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2020-08-21 14:53:30,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 14:53:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2020-08-21 14:53:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-21 14:53:30,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:30,378 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:30,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:53:30,379 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1461029712, now seen corresponding path program 21 times [2020-08-21 14:53:30,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:30,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096561469] [2020-08-21 14:53:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:30,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-08-21 14:53:31,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096561469] [2020-08-21 14:53:31,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:31,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 14:53:31,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690538826] [2020-08-21 14:53:31,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 14:53:31,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 14:53:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:53:31,558 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 26 states. [2020-08-21 14:53:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:31,991 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-08-21 14:53:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 14:53:31,992 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2020-08-21 14:53:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:31,993 INFO L225 Difference]: With dead ends: 100 [2020-08-21 14:53:31,993 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 14:53:31,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 14:53:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 14:53:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-21 14:53:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 14:53:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-08-21 14:53:32,001 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 160 [2020-08-21 14:53:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:32,001 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-08-21 14:53:32,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 14:53:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-08-21 14:53:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-08-21 14:53:32,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:32,003 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:32,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:53:32,004 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:32,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1249222577, now seen corresponding path program 22 times [2020-08-21 14:53:32,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:32,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155718326] [2020-08-21 14:53:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:32,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-08-21 14:53:33,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155718326] [2020-08-21 14:53:33,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:33,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 14:53:33,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678458085] [2020-08-21 14:53:33,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 14:53:33,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:33,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 14:53:33,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:53:33,099 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 27 states. [2020-08-21 14:53:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:33,549 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-08-21 14:53:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 14:53:33,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2020-08-21 14:53:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:33,552 INFO L225 Difference]: With dead ends: 103 [2020-08-21 14:53:33,553 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 14:53:33,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-21 14:53:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 14:53:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-21 14:53:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 14:53:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-08-21 14:53:33,562 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 167 [2020-08-21 14:53:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:33,563 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-08-21 14:53:33,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 14:53:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-08-21 14:53:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-08-21 14:53:33,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:33,566 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:33,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 14:53:33,569 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1284144570, now seen corresponding path program 23 times [2020-08-21 14:53:33,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:33,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972154479] [2020-08-21 14:53:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:33,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-08-21 14:53:34,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972154479] [2020-08-21 14:53:34,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:34,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 14:53:34,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214453461] [2020-08-21 14:53:34,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 14:53:34,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 14:53:34,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:53:34,830 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 28 states. [2020-08-21 14:53:35,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:35,288 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-08-21 14:53:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 14:53:35,288 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2020-08-21 14:53:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:35,290 INFO L225 Difference]: With dead ends: 106 [2020-08-21 14:53:35,290 INFO L226 Difference]: Without dead ends: 102 [2020-08-21 14:53:35,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 14:53:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-21 14:53:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-08-21 14:53:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-21 14:53:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-08-21 14:53:35,296 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 174 [2020-08-21 14:53:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:35,297 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-08-21 14:53:35,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 14:53:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-08-21 14:53:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-21 14:53:35,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:35,299 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:35,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 14:53:35,299 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:35,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1205012069, now seen corresponding path program 24 times [2020-08-21 14:53:35,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:35,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21159141] [2020-08-21 14:53:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:35,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-08-21 14:53:36,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21159141] [2020-08-21 14:53:36,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:36,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 14:53:36,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872124273] [2020-08-21 14:53:36,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 14:53:36,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 14:53:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 14:53:36,642 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 29 states. [2020-08-21 14:53:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:37,130 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2020-08-21 14:53:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 14:53:37,131 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2020-08-21 14:53:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:37,133 INFO L225 Difference]: With dead ends: 109 [2020-08-21 14:53:37,133 INFO L226 Difference]: Without dead ends: 105 [2020-08-21 14:53:37,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-21 14:53:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-21 14:53:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-08-21 14:53:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 14:53:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2020-08-21 14:53:37,141 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 181 [2020-08-21 14:53:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:37,142 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2020-08-21 14:53:37,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 14:53:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2020-08-21 14:53:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-21 14:53:37,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:37,145 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:37,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 14:53:37,145 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1312024796, now seen corresponding path program 25 times [2020-08-21 14:53:37,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:37,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409330988] [2020-08-21 14:53:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:37,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-08-21 14:53:38,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409330988] [2020-08-21 14:53:38,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:38,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 14:53:38,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546255542] [2020-08-21 14:53:38,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 14:53:38,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 14:53:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-21 14:53:38,516 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 30 states. [2020-08-21 14:53:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:39,026 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-08-21 14:53:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 14:53:39,027 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2020-08-21 14:53:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:39,029 INFO L225 Difference]: With dead ends: 112 [2020-08-21 14:53:39,029 INFO L226 Difference]: Without dead ends: 108 [2020-08-21 14:53:39,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1136, Invalid=1944, Unknown=0, NotChecked=0, Total=3080 [2020-08-21 14:53:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-21 14:53:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-08-21 14:53:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 14:53:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-08-21 14:53:39,035 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 188 [2020-08-21 14:53:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:39,036 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-08-21 14:53:39,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 14:53:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-08-21 14:53:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-21 14:53:39,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:39,037 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:39,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 14:53:39,038 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash 461591931, now seen corresponding path program 26 times [2020-08-21 14:53:39,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:39,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067112248] [2020-08-21 14:53:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:39,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:40,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:40,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:40,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:40,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:40,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:40,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-08-21 14:53:40,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067112248] [2020-08-21 14:53:40,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:40,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 14:53:40,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031949523] [2020-08-21 14:53:40,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 14:53:40,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:40,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 14:53:40,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-21 14:53:40,426 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 31 states. [2020-08-21 14:53:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:40,924 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-08-21 14:53:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 14:53:40,925 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2020-08-21 14:53:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:40,926 INFO L225 Difference]: With dead ends: 115 [2020-08-21 14:53:40,926 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 14:53:40,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2020-08-21 14:53:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 14:53:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-08-21 14:53:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 14:53:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2020-08-21 14:53:40,934 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 195 [2020-08-21 14:53:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:40,934 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2020-08-21 14:53:40,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 14:53:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2020-08-21 14:53:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-08-21 14:53:40,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:40,936 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:40,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 14:53:40,936 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1460254606, now seen corresponding path program 27 times [2020-08-21 14:53:40,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:40,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133124105] [2020-08-21 14:53:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:41,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-08-21 14:53:42,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133124105] [2020-08-21 14:53:42,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:42,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 14:53:42,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628931798] [2020-08-21 14:53:42,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 14:53:42,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:42,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 14:53:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-21 14:53:42,671 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand 32 states. [2020-08-21 14:53:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:43,217 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-08-21 14:53:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 14:53:43,218 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2020-08-21 14:53:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:43,220 INFO L225 Difference]: With dead ends: 118 [2020-08-21 14:53:43,220 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 14:53:43,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1307, Invalid=2233, Unknown=0, NotChecked=0, Total=3540 [2020-08-21 14:53:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 14:53:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-08-21 14:53:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 14:53:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2020-08-21 14:53:43,227 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 202 [2020-08-21 14:53:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:43,228 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2020-08-21 14:53:43,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 14:53:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2020-08-21 14:53:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-08-21 14:53:43,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:43,229 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:43,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 14:53:43,230 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:43,230 INFO L82 PathProgramCache]: Analyzing trace with hash 788262289, now seen corresponding path program 28 times [2020-08-21 14:53:43,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:43,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058211163] [2020-08-21 14:53:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:43,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-08-21 14:53:44,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058211163] [2020-08-21 14:53:44,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:44,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-21 14:53:44,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129768949] [2020-08-21 14:53:44,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-21 14:53:44,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-21 14:53:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 14:53:44,898 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand 33 states. [2020-08-21 14:53:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:45,482 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-08-21 14:53:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-21 14:53:45,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2020-08-21 14:53:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:45,484 INFO L225 Difference]: With dead ends: 121 [2020-08-21 14:53:45,484 INFO L226 Difference]: Without dead ends: 117 [2020-08-21 14:53:45,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1397, Invalid=2385, Unknown=0, NotChecked=0, Total=3782 [2020-08-21 14:53:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-21 14:53:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-08-21 14:53:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-21 14:53:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2020-08-21 14:53:45,493 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 209 [2020-08-21 14:53:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:45,494 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2020-08-21 14:53:45,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-21 14:53:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2020-08-21 14:53:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-21 14:53:45,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:45,496 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:45,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 14:53:45,496 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash -674054408, now seen corresponding path program 29 times [2020-08-21 14:53:45,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:45,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628982655] [2020-08-21 14:53:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:45,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:46,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-08-21 14:53:47,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628982655] [2020-08-21 14:53:47,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:47,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 14:53:47,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620221244] [2020-08-21 14:53:47,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 14:53:47,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 14:53:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 14:53:47,166 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 34 states. [2020-08-21 14:53:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:47,795 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2020-08-21 14:53:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-21 14:53:47,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2020-08-21 14:53:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:47,797 INFO L225 Difference]: With dead ends: 124 [2020-08-21 14:53:47,797 INFO L226 Difference]: Without dead ends: 120 [2020-08-21 14:53:47,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1490, Invalid=2542, Unknown=0, NotChecked=0, Total=4032 [2020-08-21 14:53:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-21 14:53:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-08-21 14:53:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 14:53:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 134 transitions. [2020-08-21 14:53:47,805 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 134 transitions. Word has length 216 [2020-08-21 14:53:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:47,806 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 134 transitions. [2020-08-21 14:53:47,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-21 14:53:47,806 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 134 transitions. [2020-08-21 14:53:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-08-21 14:53:47,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:47,810 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:47,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 14:53:47,811 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:47,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1144876711, now seen corresponding path program 30 times [2020-08-21 14:53:47,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:47,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954816212] [2020-08-21 14:53:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:47,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:48,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-08-21 14:53:49,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954816212] [2020-08-21 14:53:49,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:49,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-21 14:53:49,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743146437] [2020-08-21 14:53:49,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-21 14:53:49,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-21 14:53:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 14:53:49,588 INFO L87 Difference]: Start difference. First operand 120 states and 134 transitions. Second operand 35 states. [2020-08-21 14:53:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:50,188 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2020-08-21 14:53:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 14:53:50,189 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2020-08-21 14:53:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:50,191 INFO L225 Difference]: With dead ends: 127 [2020-08-21 14:53:50,191 INFO L226 Difference]: Without dead ends: 123 [2020-08-21 14:53:50,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1586, Invalid=2704, Unknown=0, NotChecked=0, Total=4290 [2020-08-21 14:53:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-21 14:53:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-08-21 14:53:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 14:53:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2020-08-21 14:53:50,200 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 223 [2020-08-21 14:53:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:50,201 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2020-08-21 14:53:50,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-21 14:53:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2020-08-21 14:53:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-21 14:53:50,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:50,203 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:50,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 14:53:50,203 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1122595486, now seen corresponding path program 31 times [2020-08-21 14:53:50,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:50,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133856] [2020-08-21 14:53:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:50,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:51,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-08-21 14:53:52,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133856] [2020-08-21 14:53:52,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:52,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-21 14:53:52,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753877388] [2020-08-21 14:53:52,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-21 14:53:52,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:52,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-21 14:53:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 14:53:52,298 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 36 states. [2020-08-21 14:53:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:52,933 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-08-21 14:53:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 14:53:52,933 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2020-08-21 14:53:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:52,935 INFO L225 Difference]: With dead ends: 130 [2020-08-21 14:53:52,935 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 14:53:52,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1685, Invalid=2871, Unknown=0, NotChecked=0, Total=4556 [2020-08-21 14:53:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 14:53:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-08-21 14:53:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-21 14:53:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2020-08-21 14:53:52,942 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 230 [2020-08-21 14:53:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:52,942 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2020-08-21 14:53:52,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-21 14:53:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2020-08-21 14:53:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-08-21 14:53:52,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:52,944 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:52,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 14:53:52,944 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1055422653, now seen corresponding path program 32 times [2020-08-21 14:53:52,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:52,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902832234] [2020-08-21 14:53:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:53,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:54,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-08-21 14:53:55,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902832234] [2020-08-21 14:53:55,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:55,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-21 14:53:55,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971711292] [2020-08-21 14:53:55,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-21 14:53:55,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-21 14:53:55,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 14:53:55,034 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand 37 states. [2020-08-21 14:53:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:55,683 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2020-08-21 14:53:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-21 14:53:55,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2020-08-21 14:53:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:55,685 INFO L225 Difference]: With dead ends: 133 [2020-08-21 14:53:55,685 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 14:53:55,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1787, Invalid=3043, Unknown=0, NotChecked=0, Total=4830 [2020-08-21 14:53:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 14:53:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-08-21 14:53:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-21 14:53:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2020-08-21 14:53:55,692 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 237 [2020-08-21 14:53:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:55,693 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2020-08-21 14:53:55,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-21 14:53:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2020-08-21 14:53:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-21 14:53:55,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:55,695 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:55,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 14:53:55,695 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1624997172, now seen corresponding path program 33 times [2020-08-21 14:53:55,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:55,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672489171] [2020-08-21 14:53:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:55,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:56,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-08-21 14:53:57,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672489171] [2020-08-21 14:53:57,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:53:57,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-21 14:53:57,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591551236] [2020-08-21 14:53:57,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-21 14:53:57,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:53:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-21 14:53:57,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 14:53:57,968 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand 38 states. [2020-08-21 14:53:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:53:58,656 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-21 14:53:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-21 14:53:58,656 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2020-08-21 14:53:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:53:58,658 INFO L225 Difference]: With dead ends: 136 [2020-08-21 14:53:58,659 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 14:53:58,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1892, Invalid=3220, Unknown=0, NotChecked=0, Total=5112 [2020-08-21 14:53:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 14:53:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-08-21 14:53:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 14:53:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2020-08-21 14:53:58,667 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 244 [2020-08-21 14:53:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:53:58,667 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2020-08-21 14:53:58,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-21 14:53:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2020-08-21 14:53:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-08-21 14:53:58,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:53:58,669 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:53:58,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 14:53:58,669 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:53:58,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:53:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2109887533, now seen corresponding path program 34 times [2020-08-21 14:53:58,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:53:58,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20336911] [2020-08-21 14:53:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:53:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:53:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:53:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:58,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:53:59,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:53:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-08-21 14:54:00,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20336911] [2020-08-21 14:54:00,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:00,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-21 14:54:00,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151387808] [2020-08-21 14:54:00,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-21 14:54:00,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:00,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-21 14:54:00,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 14:54:00,983 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand 39 states. [2020-08-21 14:54:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:01,682 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2020-08-21 14:54:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-21 14:54:01,683 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2020-08-21 14:54:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:01,685 INFO L225 Difference]: With dead ends: 139 [2020-08-21 14:54:01,685 INFO L226 Difference]: Without dead ends: 135 [2020-08-21 14:54:01,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2000, Invalid=3402, Unknown=0, NotChecked=0, Total=5402 [2020-08-21 14:54:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-21 14:54:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-08-21 14:54:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-21 14:54:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 149 transitions. [2020-08-21 14:54:01,692 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 149 transitions. Word has length 251 [2020-08-21 14:54:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:01,693 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 149 transitions. [2020-08-21 14:54:01,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-21 14:54:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 149 transitions. [2020-08-21 14:54:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-08-21 14:54:01,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:01,695 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:01,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-21 14:54:01,695 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:01,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1202454326, now seen corresponding path program 35 times [2020-08-21 14:54:01,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:01,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387213819] [2020-08-21 14:54:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:01,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:01,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:01,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:02,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:03,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-08-21 14:54:04,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387213819] [2020-08-21 14:54:04,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:04,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-21 14:54:04,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494159379] [2020-08-21 14:54:04,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-21 14:54:04,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-21 14:54:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 14:54:04,409 INFO L87 Difference]: Start difference. First operand 135 states and 149 transitions. Second operand 40 states. [2020-08-21 14:54:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:05,130 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2020-08-21 14:54:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-21 14:54:05,130 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 258 [2020-08-21 14:54:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:05,132 INFO L225 Difference]: With dead ends: 142 [2020-08-21 14:54:05,132 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 14:54:05,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2111, Invalid=3589, Unknown=0, NotChecked=0, Total=5700 [2020-08-21 14:54:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 14:54:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-08-21 14:54:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 14:54:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2020-08-21 14:54:05,140 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 258 [2020-08-21 14:54:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:05,140 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2020-08-21 14:54:05,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-21 14:54:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2020-08-21 14:54:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-21 14:54:05,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:05,142 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:05,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-21 14:54:05,143 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1327343593, now seen corresponding path program 36 times [2020-08-21 14:54:05,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:05,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691019647] [2020-08-21 14:54:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:05,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:06,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:07,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:07,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:07,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:07,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-08-21 14:54:07,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691019647] [2020-08-21 14:54:07,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:07,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-21 14:54:07,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711418967] [2020-08-21 14:54:07,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-21 14:54:07,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-21 14:54:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 14:54:07,700 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand 41 states.