/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:41:01,412 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 22:41:01,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:41:01,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:41:01,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:41:01,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:41:01,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:41:01,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:41:01,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:41:01,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:41:01,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:41:01,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:41:01,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:41:01,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:41:01,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:41:01,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:41:01,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:41:01,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:41:01,522 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 [2020-08-18 22:41:01,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:41:01,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:41:01,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:41:01,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:41:01,545 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:41:01,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:41:01,545 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:41:01,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:41:01,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:41:01,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:41:01,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:41:01,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:41:01,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:41:01,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:41:01,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:41:01,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:41:01,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:41:01,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:41:01,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:41:01,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:41:01,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:41:01,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:41:01,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:41:01,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:41:01,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:41:01,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:41:01,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:41:01,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:41:01,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:41:01,549 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 -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:41:01,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:41:01,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:41:01,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:41:01,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:41:01,885 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:41:01,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-18 22:41:01,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2075c8ce7/bcee610ee57043b38fbe32443523b0d0/FLAG54e80a0f1 [2020-08-18 22:41:02,330 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:41:02,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-18 22:41:02,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2075c8ce7/bcee610ee57043b38fbe32443523b0d0/FLAG54e80a0f1 [2020-08-18 22:41:02,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2075c8ce7/bcee610ee57043b38fbe32443523b0d0 [2020-08-18 22:41:02,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:41:02,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:41:02,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:41:02,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:41:02,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:41:02,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:41:02" (1/1) ... [2020-08-18 22:41:02,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27030054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:02, skipping insertion in model container [2020-08-18 22:41:02,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:41:02" (1/1) ... [2020-08-18 22:41:02,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:41:02,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:41:03,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:41:03,017 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:41:03,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:41:03,048 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:41:03,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03 WrapperNode [2020-08-18 22:41:03,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:41:03,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:41:03,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:41:03,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:41:03,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (1/1) ... [2020-08-18 22:41:03,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (1/1) ... [2020-08-18 22:41:03,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (1/1) ... [2020-08-18 22:41:03,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (1/1) ... [2020-08-18 22:41:03,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (1/1) ... [2020-08-18 22:41:03,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (1/1) ... [2020-08-18 22:41:03,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (1/1) ... [2020-08-18 22:41:03,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:41:03,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:41:03,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:41:03,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:41:03,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (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 [2020-08-18 22:41:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:41:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:41:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-08-18 22:41:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-08-18 22:41:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:41:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:41:03,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:41:03,219 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-08-18 22:41:03,219 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-08-18 22:41:03,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:41:03,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:41:03,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:41:03,403 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:41:03,403 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:41:03,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:41:03 BoogieIcfgContainer [2020-08-18 22:41:03,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:41:03,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:41:03,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:41:03,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:41:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:41:02" (1/3) ... [2020-08-18 22:41:03,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce5d879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:41:03, skipping insertion in model container [2020-08-18 22:41:03,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:41:03" (2/3) ... [2020-08-18 22:41:03,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce5d879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:41:03, skipping insertion in model container [2020-08-18 22:41:03,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:41:03" (3/3) ... [2020-08-18 22:41:03,421 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-08-18 22:41:03,431 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:41:03,438 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:41:03,451 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:41:03,474 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:41:03,474 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:41:03,475 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:41:03,475 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:41:03,475 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:41:03,475 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:41:03,475 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:41:03,475 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:41:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-18 22:41:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 22:41:03,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:03,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:03,500 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:03,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-08-18 22:41:03,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:03,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185516693] [2020-08-18 22:41:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:41:03,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185516693] [2020-08-18 22:41:03,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:03,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:41:03,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304301317] [2020-08-18 22:41:03,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:41:03,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:03,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:41:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:41:03,847 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-08-18 22:41:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:04,029 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-08-18 22:41:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:41:04,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 22:41:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:04,046 INFO L225 Difference]: With dead ends: 41 [2020-08-18 22:41:04,046 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 22:41:04,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:41:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 22:41:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 22:41:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 22:41:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-18 22:41:04,090 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-08-18 22:41:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:04,091 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-18 22:41:04,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:41:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-18 22:41:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 22:41:04,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:04,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:04,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:41:04,094 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-08-18 22:41:04,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:04,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323987320] [2020-08-18 22:41:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:41:04,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323987320] [2020-08-18 22:41:04,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:04,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 22:41:04,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889277323] [2020-08-18 22:41:04,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:41:04,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:41:04,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:41:04,284 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-08-18 22:41:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:04,374 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 22:41:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:41:04,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-18 22:41:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:04,376 INFO L225 Difference]: With dead ends: 33 [2020-08-18 22:41:04,376 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 22:41:04,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:41:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 22:41:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-18 22:41:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 22:41:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-18 22:41:04,385 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-08-18 22:41:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:04,386 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-18 22:41:04,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:41:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-18 22:41:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:41:04,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:04,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:04,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:41:04,388 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-08-18 22:41:04,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:04,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698893084] [2020-08-18 22:41:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:41:04,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698893084] [2020-08-18 22:41:04,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:04,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:41:04,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941627368] [2020-08-18 22:41:04,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:41:04,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:41:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:41:04,491 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-08-18 22:41:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:04,531 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-18 22:41:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:41:04,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 22:41:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:04,533 INFO L225 Difference]: With dead ends: 41 [2020-08-18 22:41:04,534 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 22:41:04,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:41:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 22:41:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-18 22:41:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 22:41:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-18 22:41:04,553 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-08-18 22:41:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:04,554 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-18 22:41:04,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:41:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-18 22:41:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:41:04,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:04,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:04,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:41:04,556 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-08-18 22:41:04,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:04,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115944737] [2020-08-18 22:41:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:41:04,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115944737] [2020-08-18 22:41:04,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:04,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 22:41:04,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483169457] [2020-08-18 22:41:04,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:41:04,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:41:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:41:04,749 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-08-18 22:41:04,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:04,877 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-08-18 22:41:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:41:04,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-18 22:41:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:04,879 INFO L225 Difference]: With dead ends: 36 [2020-08-18 22:41:04,879 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 22:41:04,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:41:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 22:41:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 22:41:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:41:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 22:41:04,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-08-18 22:41:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:04,887 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 22:41:04,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:41:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 22:41:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 22:41:04,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:04,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:04,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:41:04,889 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-08-18 22:41:04,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:04,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556134418] [2020-08-18 22:41:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 22:41:05,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556134418] [2020-08-18 22:41:05,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:05,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:41:05,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165974978] [2020-08-18 22:41:05,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:41:05,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:41:05,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:41:05,041 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-08-18 22:41:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:05,077 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-18 22:41:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:41:05,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-18 22:41:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:05,078 INFO L225 Difference]: With dead ends: 42 [2020-08-18 22:41:05,079 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 22:41:05,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:41:05,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 22:41:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 22:41:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:41:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-18 22:41:05,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-08-18 22:41:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:05,086 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-18 22:41:05,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:41:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-18 22:41:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 22:41:05,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:05,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:05,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:41:05,088 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-08-18 22:41:05,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:05,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919108040] [2020-08-18 22:41:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 22:41:05,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919108040] [2020-08-18 22:41:05,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:05,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:41:05,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806539758] [2020-08-18 22:41:05,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:41:05,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:05,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:41:05,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:41:05,325 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-08-18 22:41:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:05,553 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-18 22:41:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:41:05,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-08-18 22:41:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:05,556 INFO L225 Difference]: With dead ends: 42 [2020-08-18 22:41:05,556 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 22:41:05,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:41:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 22:41:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-08-18 22:41:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 22:41:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-18 22:41:05,564 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-08-18 22:41:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:05,565 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-18 22:41:05,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:41:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-18 22:41:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 22:41:05,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:05,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:05,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:41:05,567 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-08-18 22:41:05,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:05,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851270157] [2020-08-18 22:41:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 22:41:05,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851270157] [2020-08-18 22:41:05,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:05,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:41:05,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985968883] [2020-08-18 22:41:05,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:41:05,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:41:05,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:05,873 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2020-08-18 22:41:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:06,171 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-18 22:41:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:41:06,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-18 22:41:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:06,176 INFO L225 Difference]: With dead ends: 48 [2020-08-18 22:41:06,176 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 22:41:06,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:41:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 22:41:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-08-18 22:41:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 22:41:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 22:41:06,188 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-08-18 22:41:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:06,189 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 22:41:06,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:41:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 22:41:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 22:41:06,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:06,192 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:06,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:41:06,192 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-08-18 22:41:06,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:06,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026124307] [2020-08-18 22:41:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 22:41:06,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026124307] [2020-08-18 22:41:06,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:06,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 22:41:06,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796181747] [2020-08-18 22:41:06,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 22:41:06,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 22:41:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:41:06,607 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-08-18 22:41:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:06,969 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-18 22:41:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:41:06,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-18 22:41:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:06,970 INFO L225 Difference]: With dead ends: 54 [2020-08-18 22:41:06,971 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 22:41:06,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:41:06,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 22:41:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-08-18 22:41:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 22:41:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-18 22:41:06,979 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-08-18 22:41:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:06,979 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-18 22:41:06,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 22:41:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-18 22:41:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 22:41:06,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:06,981 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:06,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:41:06,982 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-08-18 22:41:06,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:06,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466886484] [2020-08-18 22:41:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-18 22:41:07,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466886484] [2020-08-18 22:41:07,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:07,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 22:41:07,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743594680] [2020-08-18 22:41:07,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 22:41:07,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 22:41:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:41:07,358 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 18 states. [2020-08-18 22:41:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:07,774 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-18 22:41:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:41:07,774 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-18 22:41:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:07,776 INFO L225 Difference]: With dead ends: 60 [2020-08-18 22:41:07,776 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 22:41:07,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:41:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 22:41:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-08-18 22:41:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 22:41:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-18 22:41:07,784 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-08-18 22:41:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:07,784 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-18 22:41:07,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 22:41:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-18 22:41:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 22:41:07,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:07,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:07,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:41:07,786 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-08-18 22:41:07,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:07,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613287803] [2020-08-18 22:41:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-18 22:41:08,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613287803] [2020-08-18 22:41:08,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:08,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 22:41:08,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859852794] [2020-08-18 22:41:08,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 22:41:08,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 22:41:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:41:08,252 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2020-08-18 22:41:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:08,796 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-18 22:41:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:41:08,797 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-08-18 22:41:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:08,798 INFO L225 Difference]: With dead ends: 66 [2020-08-18 22:41:08,799 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 22:41:08,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 22:41:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 22:41:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-08-18 22:41:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 22:41:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-08-18 22:41:08,814 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-08-18 22:41:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:08,815 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-08-18 22:41:08,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 22:41:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-08-18 22:41:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-18 22:41:08,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:08,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:08,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:41:08,818 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-08-18 22:41:08,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:08,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751991944] [2020-08-18 22:41:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-18 22:41:09,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751991944] [2020-08-18 22:41:09,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:09,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:41:09,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054201648] [2020-08-18 22:41:09,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:41:09,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:09,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:41:09,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:41:09,302 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-08-18 22:41:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:09,932 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-08-18 22:41:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 22:41:09,933 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2020-08-18 22:41:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:09,934 INFO L225 Difference]: With dead ends: 72 [2020-08-18 22:41:09,935 INFO L226 Difference]: Without dead ends: 68 [2020-08-18 22:41:09,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 22:41:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-18 22:41:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-08-18 22:41:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 22:41:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-08-18 22:41:09,943 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-08-18 22:41:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:09,943 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-08-18 22:41:09,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:41:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-08-18 22:41:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 22:41:09,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:09,945 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:09,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:41:09,945 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:09,946 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-08-18 22:41:09,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:09,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132160062] [2020-08-18 22:41:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-18 22:41:10,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132160062] [2020-08-18 22:41:10,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:10,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 22:41:10,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067136259] [2020-08-18 22:41:10,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 22:41:10,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 22:41:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:41:10,620 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-08-18 22:41:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:11,417 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-08-18 22:41:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:41:11,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-18 22:41:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:11,419 INFO L225 Difference]: With dead ends: 78 [2020-08-18 22:41:11,419 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 22:41:11,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 22:41:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 22:41:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-08-18 22:41:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 22:41:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-08-18 22:41:11,435 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-08-18 22:41:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:11,435 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-08-18 22:41:11,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 22:41:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-08-18 22:41:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 22:41:11,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:11,440 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:11,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:41:11,440 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-08-18 22:41:11,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:11,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581599961] [2020-08-18 22:41:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-18 22:41:12,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581599961] [2020-08-18 22:41:12,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:12,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 22:41:12,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336774168] [2020-08-18 22:41:12,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 22:41:12,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 22:41:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:41:12,102 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 25 states. [2020-08-18 22:41:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:13,012 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-08-18 22:41:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 22:41:13,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-08-18 22:41:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:13,014 INFO L225 Difference]: With dead ends: 84 [2020-08-18 22:41:13,014 INFO L226 Difference]: Without dead ends: 80 [2020-08-18 22:41:13,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 22:41:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-18 22:41:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-08-18 22:41:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 22:41:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-18 22:41:13,022 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-08-18 22:41:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:13,022 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-18 22:41:13,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 22:41:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-18 22:41:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 22:41:13,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:13,024 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:13,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:41:13,024 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-08-18 22:41:13,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:13,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130946710] [2020-08-18 22:41:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-08-18 22:41:13,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130946710] [2020-08-18 22:41:13,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:13,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 22:41:13,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407438153] [2020-08-18 22:41:13,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 22:41:13,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 22:41:13,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:41:13,850 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2020-08-18 22:41:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:14,914 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-08-18 22:41:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 22:41:14,915 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-08-18 22:41:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:14,916 INFO L225 Difference]: With dead ends: 90 [2020-08-18 22:41:14,916 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 22:41:14,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 22:41:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 22:41:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-08-18 22:41:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 22:41:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-08-18 22:41:14,937 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-08-18 22:41:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:14,937 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-08-18 22:41:14,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 22:41:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-08-18 22:41:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 22:41:14,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:14,939 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:14,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:41:14,939 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-08-18 22:41:14,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:14,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043720805] [2020-08-18 22:41:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-18 22:41:15,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043720805] [2020-08-18 22:41:15,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:15,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 22:41:15,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717447909] [2020-08-18 22:41:15,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 22:41:15,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 22:41:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-18 22:41:15,816 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 29 states. [2020-08-18 22:41:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:17,009 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-08-18 22:41:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 22:41:17,009 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-08-18 22:41:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:17,011 INFO L225 Difference]: With dead ends: 96 [2020-08-18 22:41:17,011 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 22:41:17,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 22:41:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 22:41:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-08-18 22:41:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 22:41:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-08-18 22:41:17,019 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-08-18 22:41:17,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:17,020 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-08-18 22:41:17,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 22:41:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-08-18 22:41:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 22:41:17,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:17,021 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:17,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:41:17,022 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-08-18 22:41:17,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:17,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780916967] [2020-08-18 22:41:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-08-18 22:41:18,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780916967] [2020-08-18 22:41:18,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:18,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 22:41:18,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121559867] [2020-08-18 22:41:18,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 22:41:18,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:18,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 22:41:18,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-18 22:41:18,051 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 32 states. [2020-08-18 22:41:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:19,405 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-08-18 22:41:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 22:41:19,408 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 99 [2020-08-18 22:41:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:19,409 INFO L225 Difference]: With dead ends: 102 [2020-08-18 22:41:19,409 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 22:41:19,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=3140, Unknown=0, NotChecked=0, Total=3306 [2020-08-18 22:41:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 22:41:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-08-18 22:41:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 22:41:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-08-18 22:41:19,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-08-18 22:41:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:19,417 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-08-18 22:41:19,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 22:41:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-08-18 22:41:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 22:41:19,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:19,419 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:19,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:41:19,419 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:19,430 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-08-18 22:41:19,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:19,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185249120] [2020-08-18 22:41:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-18 22:41:20,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185249120] [2020-08-18 22:41:20,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:20,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 22:41:20,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934967499] [2020-08-18 22:41:20,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 22:41:20,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 22:41:20,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 22:41:20,548 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 33 states. [2020-08-18 22:41:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:22,059 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-08-18 22:41:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 22:41:22,060 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-08-18 22:41:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:22,062 INFO L225 Difference]: With dead ends: 108 [2020-08-18 22:41:22,062 INFO L226 Difference]: Without dead ends: 104 [2020-08-18 22:41:22,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=3369, Unknown=0, NotChecked=0, Total=3540 [2020-08-18 22:41:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-18 22:41:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-08-18 22:41:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 22:41:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-08-18 22:41:22,070 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-08-18 22:41:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:22,070 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-08-18 22:41:22,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 22:41:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-08-18 22:41:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-18 22:41:22,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:22,072 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:22,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:41:22,072 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-08-18 22:41:22,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:22,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536272944] [2020-08-18 22:41:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-08-18 22:41:23,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536272944] [2020-08-18 22:41:23,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:23,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-18 22:41:23,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154659234] [2020-08-18 22:41:23,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-18 22:41:23,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-18 22:41:23,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 22:41:23,340 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 36 states. [2020-08-18 22:41:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:25,133 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-08-18 22:41:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 22:41:25,137 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-08-18 22:41:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:25,138 INFO L225 Difference]: With dead ends: 114 [2020-08-18 22:41:25,138 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 22:41:25,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=190, Invalid=4100, Unknown=0, NotChecked=0, Total=4290 [2020-08-18 22:41:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 22:41:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-08-18 22:41:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 22:41:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-18 22:41:25,147 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-08-18 22:41:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:25,147 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-18 22:41:25,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-18 22:41:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-18 22:41:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-18 22:41:25,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:25,149 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:25,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:41:25,149 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-08-18 22:41:25,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:25,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631232387] [2020-08-18 22:41:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-08-18 22:41:26,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631232387] [2020-08-18 22:41:26,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:26,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 22:41:26,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74322881] [2020-08-18 22:41:26,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 22:41:26,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 22:41:26,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 22:41:26,559 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 37 states. [2020-08-18 22:41:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:28,527 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-08-18 22:41:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 22:41:28,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 120 [2020-08-18 22:41:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:28,530 INFO L225 Difference]: With dead ends: 120 [2020-08-18 22:41:28,530 INFO L226 Difference]: Without dead ends: 116 [2020-08-18 22:41:28,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2020-08-18 22:41:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-18 22:41:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-08-18 22:41:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 22:41:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-08-18 22:41:28,538 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-08-18 22:41:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:28,538 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-08-18 22:41:28,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 22:41:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-08-18 22:41:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 22:41:28,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:28,539 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:28,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:41:28,539 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-08-18 22:41:28,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:28,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040632646] [2020-08-18 22:41:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-08-18 22:41:30,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040632646] [2020-08-18 22:41:30,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:30,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-18 22:41:30,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395763458] [2020-08-18 22:41:30,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-18 22:41:30,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-18 22:41:30,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 22:41:30,053 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 40 states. [2020-08-18 22:41:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:32,220 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-08-18 22:41:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-18 22:41:32,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 127 [2020-08-18 22:41:32,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:32,222 INFO L225 Difference]: With dead ends: 126 [2020-08-18 22:41:32,222 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 22:41:32,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=214, Invalid=5188, Unknown=0, NotChecked=0, Total=5402 [2020-08-18 22:41:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 22:41:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-08-18 22:41:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 22:41:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-08-18 22:41:32,230 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-08-18 22:41:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:32,231 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-08-18 22:41:32,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-18 22:41:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-08-18 22:41:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-18 22:41:32,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:32,232 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:32,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:41:32,233 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-08-18 22:41:32,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:32,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146331190] [2020-08-18 22:41:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-08-18 22:41:33,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146331190] [2020-08-18 22:41:33,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:33,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 22:41:33,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550070193] [2020-08-18 22:41:33,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 22:41:33,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 22:41:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 22:41:33,831 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 41 states. [2020-08-18 22:41:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:36,248 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-08-18 22:41:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-18 22:41:36,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-08-18 22:41:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:36,251 INFO L225 Difference]: With dead ends: 132 [2020-08-18 22:41:36,251 INFO L226 Difference]: Without dead ends: 128 [2020-08-18 22:41:36,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2020-08-18 22:41:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-18 22:41:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-08-18 22:41:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 22:41:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-18 22:41:36,258 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-08-18 22:41:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:36,258 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-18 22:41:36,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 22:41:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-18 22:41:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-18 22:41:36,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:36,260 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:36,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:41:36,260 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-08-18 22:41:36,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:36,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449295513] [2020-08-18 22:41:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-08-18 22:41:38,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449295513] [2020-08-18 22:41:38,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:38,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-18 22:41:38,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17138687] [2020-08-18 22:41:38,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-18 22:41:38,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-18 22:41:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 22:41:38,180 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 44 states. [2020-08-18 22:41:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:40,822 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-08-18 22:41:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-18 22:41:40,825 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 141 [2020-08-18 22:41:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:40,827 INFO L225 Difference]: With dead ends: 138 [2020-08-18 22:41:40,827 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 22:41:40,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=238, Invalid=6404, Unknown=0, NotChecked=0, Total=6642 [2020-08-18 22:41:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 22:41:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-08-18 22:41:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 22:41:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-08-18 22:41:40,835 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-08-18 22:41:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:40,835 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-08-18 22:41:40,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-18 22:41:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-08-18 22:41:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-18 22:41:40,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:40,837 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:40,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 22:41:40,837 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-08-18 22:41:40,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:40,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846164702] [2020-08-18 22:41:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:40,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:40,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:40,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:42,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:42,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:42,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:42,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:42,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:42,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-08-18 22:41:43,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846164702] [2020-08-18 22:41:43,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:43,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-18 22:41:43,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862942818] [2020-08-18 22:41:43,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-18 22:41:43,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:43,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-18 22:41:43,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 22:41:43,098 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 46 states. [2020-08-18 22:41:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:46,053 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-08-18 22:41:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-18 22:41:46,054 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-08-18 22:41:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:46,055 INFO L225 Difference]: With dead ends: 144 [2020-08-18 22:41:46,055 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 22:41:46,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=250, Invalid=7060, Unknown=0, NotChecked=0, Total=7310 [2020-08-18 22:41:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 22:41:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-08-18 22:41:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 22:41:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-08-18 22:41:46,063 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-08-18 22:41:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:46,063 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-08-18 22:41:46,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-18 22:41:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-08-18 22:41:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-18 22:41:46,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:46,065 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:46,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 22:41:46,065 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-08-18 22:41:46,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:46,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318945394] [2020-08-18 22:41:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:46,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:47,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:48,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-08-18 22:41:48,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318945394] [2020-08-18 22:41:48,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:48,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-18 22:41:48,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836704892] [2020-08-18 22:41:48,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-18 22:41:48,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-18 22:41:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 22:41:48,303 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 48 states. [2020-08-18 22:41:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:51,539 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-08-18 22:41:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-18 22:41:51,540 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 155 [2020-08-18 22:41:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:51,541 INFO L225 Difference]: With dead ends: 150 [2020-08-18 22:41:51,541 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 22:41:51,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=262, Invalid=7748, Unknown=0, NotChecked=0, Total=8010 [2020-08-18 22:41:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 22:41:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-08-18 22:41:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 22:41:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-18 22:41:51,547 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-08-18 22:41:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:51,547 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-18 22:41:51,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-18 22:41:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-18 22:41:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 22:41:51,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:51,549 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:51,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 22:41:51,549 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:51,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-08-18 22:41:51,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:51,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204871608] [2020-08-18 22:41:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:51,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:51,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:51,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:51,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:51,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:51,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:51,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:52,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:53,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:53,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:53,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:53,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:53,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:53,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-08-18 22:41:53,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204871608] [2020-08-18 22:41:53,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:53,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-18 22:41:53,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133977038] [2020-08-18 22:41:53,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-18 22:41:53,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-18 22:41:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 22:41:53,926 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 49 states. [2020-08-18 22:41:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:57,432 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-08-18 22:41:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-18 22:41:57,432 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 162 [2020-08-18 22:41:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:57,434 INFO L225 Difference]: With dead ends: 156 [2020-08-18 22:41:57,434 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 22:41:57,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=267, Invalid=8105, Unknown=0, NotChecked=0, Total=8372 [2020-08-18 22:41:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 22:41:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-08-18 22:41:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 22:41:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-08-18 22:41:57,440 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 162 [2020-08-18 22:41:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:57,441 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-08-18 22:41:57,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-18 22:41:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-08-18 22:41:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-18 22:41:57,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:57,442 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:57,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 22:41:57,442 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:57,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1407042496, now seen corresponding path program 11 times [2020-08-18 22:41:57,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:57,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236577414] [2020-08-18 22:41:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:57,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:57,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:41:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:57,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:57,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:57,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:59,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:59,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:59,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:59,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:59,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:59,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 22:41:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-08-18 22:42:00,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236577414] [2020-08-18 22:42:00,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:00,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-18 22:42:00,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234130839] [2020-08-18 22:42:00,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-18 22:42:00,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:00,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-18 22:42:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 22:42:00,253 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 52 states.