/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:52:58,250 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 17:52:58,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:52:58,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:52:58,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:52:58,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:52:58,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:52:58,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:52:58,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:52:58,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:52:58,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:52:58,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:52:58,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:52:58,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:52:58,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:52:58,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:52:58,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:52:58,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:52:58,378 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 17:52:58,416 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:52:58,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:52:58,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:52:58,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:52:58,419 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:52:58,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:52:58,419 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:52:58,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:52:58,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:52:58,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:52:58,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:52:58,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:52:58,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:52:58,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:52:58,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:52:58,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:52:58,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:52:58,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:52:58,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:52:58,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:52:58,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:52:58,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:52:58,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:52:58,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:52:58,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:52:58,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:52:58,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:52:58,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:52:58,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:52:58,425 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:52:58,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:52:58,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:52:58,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:52:58,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:52:58,749 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:52:58,750 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-08-18 17:52:58,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52cf1e9a0/8b5f17934c5043ac9600bc0eb60ae1e8/FLAGa1f3f0f0f [2020-08-18 17:52:59,333 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:52:59,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-08-18 17:52:59,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52cf1e9a0/8b5f17934c5043ac9600bc0eb60ae1e8/FLAGa1f3f0f0f [2020-08-18 17:52:59,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52cf1e9a0/8b5f17934c5043ac9600bc0eb60ae1e8 [2020-08-18 17:52:59,718 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:52:59,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:52:59,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:52:59,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:52:59,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:52:59,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:52:59,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3699edcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59, skipping insertion in model container [2020-08-18 17:52:59,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:52:59,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:52:59,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:52:59,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:52:59,952 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:52:59,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:52:59,982 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:52:59,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59 WrapperNode [2020-08-18 17:52:59,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:52:59,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:52:59,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:52:59,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:52:59,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:52:59,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:52:59,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:52:59,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:53:00,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:53:00,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:53:00,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (1/1) ... [2020-08-18 17:53:00,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:53:00,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:53:00,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:53:00,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:53:00,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (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 17:53:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:53:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:53:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 17:53:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:53:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 17:53:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:53:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 17:53:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:53:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:53:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:53:00,328 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:53:00,328 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:53:00,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:00 BoogieIcfgContainer [2020-08-18 17:53:00,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:53:00,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:53:00,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:53:00,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:53:00,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:52:59" (1/3) ... [2020-08-18 17:53:00,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cebbaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:00, skipping insertion in model container [2020-08-18 17:53:00,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:59" (2/3) ... [2020-08-18 17:53:00,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cebbaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:00, skipping insertion in model container [2020-08-18 17:53:00,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:00" (3/3) ... [2020-08-18 17:53:00,340 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2020-08-18 17:53:00,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:53:00,354 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:53:00,367 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:53:00,391 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:53:00,391 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:53:00,392 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:53:00,392 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:53:00,392 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:53:00,392 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:53:00,392 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:53:00,392 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:53:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 17:53:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 17:53:00,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:00,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:00,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:00,422 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 17:53:00,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:00,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203670995] [2020-08-18 17:53:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:00,738 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-08-18 17:53:00,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:00,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:00,831 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 17:53:00,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203670995] [2020-08-18 17:53:00,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:00,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:00,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441401036] [2020-08-18 17:53:00,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:00,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:00,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:00,853 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 17:53:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:00,908 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-18 17:53:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:00,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 17:53:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:00,923 INFO L225 Difference]: With dead ends: 32 [2020-08-18 17:53:00,926 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 17:53:00,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 17:53:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 17:53:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 17:53:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 17:53:00,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 17:53:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:00,976 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 17:53:00,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 17:53:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:53:00,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:00,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:00,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:53:00,979 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 17:53:00,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:00,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986141709] [2020-08-18 17:53:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:53:01,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986141709] [2020-08-18 17:53:01,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:01,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:53:01,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353089029] [2020-08-18 17:53:01,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:53:01,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:53:01,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:53:01,193 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-18 17:53:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:01,223 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 17:53:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:53:01,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-18 17:53:01,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:01,226 INFO L225 Difference]: With dead ends: 25 [2020-08-18 17:53:01,226 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 17:53:01,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:53:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 17:53:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 17:53:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 17:53:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 17:53:01,235 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 17:53:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:01,235 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 17:53:01,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:53:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 17:53:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:53:01,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:01,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:01,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:53:01,238 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 17:53:01,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:01,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767702908] [2020-08-18 17:53:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 17:53:01,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767702908] [2020-08-18 17:53:01,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:01,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:53:01,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141514482] [2020-08-18 17:53:01,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:53:01,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:53:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:53:01,557 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-18 17:53:01,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:01,600 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 17:53:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:53:01,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-18 17:53:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:01,603 INFO L225 Difference]: With dead ends: 28 [2020-08-18 17:53:01,603 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 17:53:01,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:53:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 17:53:01,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 17:53:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 17:53:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 17:53:01,612 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 17:53:01,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:01,612 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 17:53:01,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:53:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 17:53:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:53:01,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:01,615 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:01,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:53:01,615 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:01,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 17:53:01,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:01,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241471560] [2020-08-18 17:53:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:53:01,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241471560] [2020-08-18 17:53:01,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:01,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:53:01,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529057578] [2020-08-18 17:53:01,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:53:01,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:01,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:53:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:53:01,887 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-18 17:53:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:01,953 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 17:53:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:53:01,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-18 17:53:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:01,956 INFO L225 Difference]: With dead ends: 31 [2020-08-18 17:53:01,956 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 17:53:01,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:53:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 17:53:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 17:53:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 17:53:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 17:53:01,964 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 17:53:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:01,964 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 17:53:01,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:53:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 17:53:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:53:01,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:01,966 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:01,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:53:01,967 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 17:53:01,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:01,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854667386] [2020-08-18 17:53:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 17:53:02,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854667386] [2020-08-18 17:53:02,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:02,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:53:02,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588059197] [2020-08-18 17:53:02,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:53:02,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:53:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:53:02,279 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-18 17:53:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:02,363 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 17:53:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:53:02,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-18 17:53:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:02,366 INFO L225 Difference]: With dead ends: 34 [2020-08-18 17:53:02,366 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 17:53:02,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:53:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 17:53:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 17:53:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 17:53:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 17:53:02,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 17:53:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:02,375 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 17:53:02,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:53:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 17:53:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 17:53:02,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:02,377 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:02,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:53:02,377 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:02,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 17:53:02,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:02,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442709607] [2020-08-18 17:53:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 17:53:02,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442709607] [2020-08-18 17:53:02,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:02,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:53:02,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216217083] [2020-08-18 17:53:02,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:53:02,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:53:02,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:53:02,777 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-18 17:53:02,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:02,880 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 17:53:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:53:02,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-18 17:53:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:02,882 INFO L225 Difference]: With dead ends: 37 [2020-08-18 17:53:02,882 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 17:53:02,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:53:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 17:53:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 17:53:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 17:53:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 17:53:02,890 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 17:53:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:02,890 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 17:53:02,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:53:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 17:53:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 17:53:02,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:02,892 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:02,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:53:02,893 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:02,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 17:53:02,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:02,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733795467] [2020-08-18 17:53:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:02,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 17:53:03,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733795467] [2020-08-18 17:53:03,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:03,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:53:03,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362736862] [2020-08-18 17:53:03,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:53:03,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:03,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:53:03,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:53:03,298 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-18 17:53:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:03,413 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 17:53:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:53:03,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-18 17:53:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:03,416 INFO L225 Difference]: With dead ends: 40 [2020-08-18 17:53:03,416 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 17:53:03,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:53:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 17:53:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 17:53:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 17:53:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 17:53:03,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 17:53:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:03,423 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 17:53:03,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:53:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 17:53:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 17:53:03,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:03,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:03,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:53:03,425 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 17:53:03,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:03,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084222242] [2020-08-18 17:53:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 17:53:03,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084222242] [2020-08-18 17:53:03,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:03,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:53:03,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613661090] [2020-08-18 17:53:03,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:53:03,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:03,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:53:03,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:53:03,884 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-18 17:53:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:04,040 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 17:53:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 17:53:04,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-18 17:53:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:04,042 INFO L225 Difference]: With dead ends: 43 [2020-08-18 17:53:04,042 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 17:53:04,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:53:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 17:53:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 17:53:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 17:53:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 17:53:04,054 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 17:53:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:04,055 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 17:53:04,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:53:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 17:53:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:53:04,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:04,057 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:04,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:53:04,057 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 17:53:04,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:04,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774683679] [2020-08-18 17:53:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 17:53:04,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774683679] [2020-08-18 17:53:04,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:04,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:53:04,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611309509] [2020-08-18 17:53:04,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:53:04,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:53:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:53:04,562 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-18 17:53:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:04,739 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 17:53:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:53:04,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-18 17:53:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:04,742 INFO L225 Difference]: With dead ends: 46 [2020-08-18 17:53:04,742 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 17:53:04,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:53:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 17:53:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 17:53:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:53:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 17:53:04,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 17:53:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:04,750 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 17:53:04,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:53:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 17:53:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 17:53:04,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:04,751 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:04,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:53:04,752 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 17:53:04,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:04,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552943132] [2020-08-18 17:53:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:04,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 17:53:05,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552943132] [2020-08-18 17:53:05,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:05,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 17:53:05,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057635893] [2020-08-18 17:53:05,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 17:53:05,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:05,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 17:53:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:53:05,384 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-18 17:53:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:05,585 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 17:53:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 17:53:05,586 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-18 17:53:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:05,587 INFO L225 Difference]: With dead ends: 49 [2020-08-18 17:53:05,587 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 17:53:05,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:53:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 17:53:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 17:53:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:53:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 17:53:05,603 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 17:53:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:05,604 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 17:53:05,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 17:53:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 17:53:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 17:53:05,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:05,605 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:05,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:53:05,606 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:05,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 17:53:05,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:05,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218677221] [2020-08-18 17:53:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:05,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 17:53:06,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218677221] [2020-08-18 17:53:06,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:06,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 17:53:06,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648763092] [2020-08-18 17:53:06,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 17:53:06,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:06,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 17:53:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:53:06,357 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-18 17:53:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:06,670 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 17:53:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 17:53:06,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-18 17:53:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:06,673 INFO L225 Difference]: With dead ends: 52 [2020-08-18 17:53:06,673 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:53:06,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:53:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:53:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 17:53:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 17:53:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 17:53:06,695 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 17:53:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:06,695 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 17:53:06,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 17:53:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 17:53:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 17:53:06,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:06,700 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:06,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:53:06,701 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:06,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:06,701 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-18 17:53:06,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:06,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592883587] [2020-08-18 17:53:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:06,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 17:53:07,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592883587] [2020-08-18 17:53:07,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:07,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 17:53:07,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718002945] [2020-08-18 17:53:07,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 17:53:07,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:07,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 17:53:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:53:07,566 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-18 17:53:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:07,830 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 17:53:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 17:53:07,830 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-18 17:53:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:07,831 INFO L225 Difference]: With dead ends: 55 [2020-08-18 17:53:07,832 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 17:53:07,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:53:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 17:53:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 17:53:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 17:53:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 17:53:07,838 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 17:53:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:07,839 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 17:53:07,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 17:53:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 17:53:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 17:53:07,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:07,840 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:07,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:53:07,841 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-18 17:53:07,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:07,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015490113] [2020-08-18 17:53:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:07,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 17:53:08,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015490113] [2020-08-18 17:53:08,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:08,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 17:53:08,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863289136] [2020-08-18 17:53:08,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 17:53:08,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:08,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 17:53:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-18 17:53:08,752 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-18 17:53:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:09,064 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 17:53:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 17:53:09,065 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-18 17:53:09,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:09,066 INFO L225 Difference]: With dead ends: 58 [2020-08-18 17:53:09,066 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 17:53:09,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-18 17:53:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 17:53:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 17:53:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 17:53:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 17:53:09,073 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 17:53:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:09,073 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 17:53:09,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 17:53:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 17:53:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 17:53:09,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:09,074 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:09,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:53:09,075 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-18 17:53:09,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:09,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757857338] [2020-08-18 17:53:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:09,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 17:53:10,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757857338] [2020-08-18 17:53:10,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:10,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 17:53:10,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663347061] [2020-08-18 17:53:10,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 17:53:10,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 17:53:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-18 17:53:10,111 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-18 17:53:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:10,575 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 17:53:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 17:53:10,576 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-18 17:53:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:10,577 INFO L225 Difference]: With dead ends: 61 [2020-08-18 17:53:10,577 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 17:53:10,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-18 17:53:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 17:53:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 17:53:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 17:53:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 17:53:10,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 17:53:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:10,584 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 17:53:10,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 17:53:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 17:53:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 17:53:10,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:10,585 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:10,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:53:10,585 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-18 17:53:10,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:10,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037992458] [2020-08-18 17:53:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:10,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 17:53:11,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037992458] [2020-08-18 17:53:11,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:11,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 17:53:11,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629632167] [2020-08-18 17:53:11,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 17:53:11,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:11,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 17:53:11,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 17:53:11,725 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-18 17:53:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:12,186 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 17:53:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 17:53:12,187 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-18 17:53:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:12,188 INFO L225 Difference]: With dead ends: 64 [2020-08-18 17:53:12,188 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 17:53:12,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 17:53:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 17:53:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 17:53:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 17:53:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 17:53:12,203 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 17:53:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:12,204 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 17:53:12,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 17:53:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 17:53:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 17:53:12,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:12,207 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:12,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:53:12,208 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-18 17:53:12,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:12,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137809237] [2020-08-18 17:53:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:12,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:13,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:13,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:13,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:13,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:13,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 17:53:13,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137809237] [2020-08-18 17:53:13,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:13,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-18 17:53:13,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640022160] [2020-08-18 17:53:13,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-18 17:53:13,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-18 17:53:13,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 17:53:13,501 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-18 17:53:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:14,027 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 17:53:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 17:53:14,028 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-18 17:53:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:14,030 INFO L225 Difference]: With dead ends: 67 [2020-08-18 17:53:14,030 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 17:53:14,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 17:53:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 17:53:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 17:53:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 17:53:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 17:53:14,037 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 17:53:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:14,037 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 17:53:14,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-18 17:53:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 17:53:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 17:53:14,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:14,039 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:14,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:53:14,039 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-18 17:53:14,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:14,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316826155] [2020-08-18 17:53:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:14,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:15,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:15,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:15,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 17:53:15,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316826155] [2020-08-18 17:53:15,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:15,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 17:53:15,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516460489] [2020-08-18 17:53:15,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 17:53:15,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:15,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 17:53:15,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 17:53:15,433 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-18 17:53:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:15,957 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 17:53:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 17:53:15,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-18 17:53:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:15,959 INFO L225 Difference]: With dead ends: 70 [2020-08-18 17:53:15,959 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 17:53:15,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 17:53:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 17:53:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 17:53:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 17:53:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 17:53:15,971 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 17:53:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:15,971 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 17:53:15,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 17:53:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 17:53:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 17:53:15,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:15,973 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:15,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:53:15,973 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:15,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:15,973 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-18 17:53:15,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:15,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696584224] [2020-08-18 17:53:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:17,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:17,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:17,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:17,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 17:53:17,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696584224] [2020-08-18 17:53:17,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:17,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-18 17:53:17,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630091703] [2020-08-18 17:53:17,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-18 17:53:17,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:17,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-18 17:53:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 17:53:17,481 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-18 17:53:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:18,111 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 17:53:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-18 17:53:18,112 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-18 17:53:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:18,113 INFO L225 Difference]: With dead ends: 73 [2020-08-18 17:53:18,114 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 17:53:18,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 17:53:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 17:53:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 17:53:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 17:53:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 17:53:18,121 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 17:53:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:18,122 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 17:53:18,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-18 17:53:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 17:53:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 17:53:18,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:18,124 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:18,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:53:18,124 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:18,124 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-18 17:53:18,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:18,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322636397] [2020-08-18 17:53:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:18,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:19,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 17:53:20,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322636397] [2020-08-18 17:53:20,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:20,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 17:53:20,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585992434] [2020-08-18 17:53:20,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 17:53:20,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:20,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 17:53:20,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 17:53:20,178 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-18 17:53:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:20,874 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 17:53:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-18 17:53:20,875 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-18 17:53:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:20,876 INFO L225 Difference]: With dead ends: 76 [2020-08-18 17:53:20,877 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 17:53:20,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 17:53:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 17:53:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 17:53:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 17:53:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 17:53:20,883 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 17:53:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:20,884 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 17:53:20,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 17:53:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 17:53:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 17:53:20,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:20,885 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:20,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:53:20,886 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-18 17:53:20,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:20,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391748886] [2020-08-18 17:53:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:20,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:20,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:21,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 17:53:22,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391748886] [2020-08-18 17:53:22,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:22,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-18 17:53:22,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755632608] [2020-08-18 17:53:22,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-18 17:53:22,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:22,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-18 17:53:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 17:53:22,891 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-18 17:53:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:23,684 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 17:53:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-18 17:53:23,684 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-18 17:53:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:23,686 INFO L225 Difference]: With dead ends: 79 [2020-08-18 17:53:23,686 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 17:53:23,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 17:53:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 17:53:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 17:53:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 17:53:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 17:53:23,693 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 17:53:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:23,694 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 17:53:23,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-18 17:53:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 17:53:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 17:53:23,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:23,695 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:23,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:53:23,696 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-18 17:53:23,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:23,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305347021] [2020-08-18 17:53:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:23,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:23,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:23,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:23,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:23,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:24,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:25,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:25,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:25,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:25,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:25,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-18 17:53:25,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305347021] [2020-08-18 17:53:25,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:25,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-18 17:53:25,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937348591] [2020-08-18 17:53:25,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-18 17:53:25,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-18 17:53:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 17:53:25,720 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-18 17:53:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:26,608 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-18 17:53:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-18 17:53:26,608 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-18 17:53:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:26,610 INFO L225 Difference]: With dead ends: 82 [2020-08-18 17:53:26,610 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 17:53:26,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 17:53:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 17:53:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 17:53:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 17:53:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-18 17:53:26,615 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-18 17:53:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:26,615 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-18 17:53:26,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-18 17:53:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-18 17:53:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-18 17:53:26,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:26,617 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:26,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:53:26,618 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-18 17:53:26,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:26,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369924435] [2020-08-18 17:53:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:26,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:26,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:26,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:26,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:26,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:26,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:27,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:28,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:28,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:28,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:28,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:28,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:28,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-18 17:53:28,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369924435] [2020-08-18 17:53:28,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:28,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-18 17:53:28,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406267050] [2020-08-18 17:53:28,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-18 17:53:28,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:28,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-18 17:53:28,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 17:53:28,765 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-08-18 17:53:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:29,728 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-18 17:53:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-18 17:53:29,731 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-08-18 17:53:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:29,732 INFO L225 Difference]: With dead ends: 85 [2020-08-18 17:53:29,732 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 17:53:29,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 17:53:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 17:53:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-18 17:53:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 17:53:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-18 17:53:29,739 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-18 17:53:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:29,740 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-18 17:53:29,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-18 17:53:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-18 17:53:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-18 17:53:29,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:29,741 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:29,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:53:29,742 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-18 17:53:29,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:29,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866752200] [2020-08-18 17:53:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:29,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:29,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:29,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:30,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:31,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-18 17:53:32,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866752200] [2020-08-18 17:53:32,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:32,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-18 17:53:32,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323533482] [2020-08-18 17:53:32,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-18 17:53:32,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-18 17:53:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 17:53:32,073 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-08-18 17:53:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:33,142 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-18 17:53:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-18 17:53:33,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-08-18 17:53:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:33,144 INFO L225 Difference]: With dead ends: 88 [2020-08-18 17:53:33,144 INFO L226 Difference]: Without dead ends: 84 [2020-08-18 17:53:33,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 17:53:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-18 17:53:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-18 17:53:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 17:53:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-18 17:53:33,151 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-18 17:53:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:33,151 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-18 17:53:33,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-18 17:53:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-18 17:53:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 17:53:33,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:33,153 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:33,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:53:33,153 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-18 17:53:33,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:33,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348944874] [2020-08-18 17:53:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:33,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:34,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:35,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:35,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-18 17:53:35,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348944874] [2020-08-18 17:53:35,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:35,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-18 17:53:35,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622824384] [2020-08-18 17:53:35,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-18 17:53:35,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-18 17:53:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 17:53:35,777 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-08-18 17:53:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:36,936 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-18 17:53:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-18 17:53:36,937 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-08-18 17:53:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:36,939 INFO L225 Difference]: With dead ends: 91 [2020-08-18 17:53:36,939 INFO L226 Difference]: Without dead ends: 87 [2020-08-18 17:53:36,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-18 17:53:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-18 17:53:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-18 17:53:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 17:53:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-18 17:53:36,958 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-18 17:53:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:36,958 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-18 17:53:36,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-18 17:53:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-18 17:53:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 17:53:36,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:36,960 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:36,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 17:53:36,960 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-18 17:53:36,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:36,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389580154] [2020-08-18 17:53:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-18 17:53:39,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389580154] [2020-08-18 17:53:39,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:39,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-18 17:53:39,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119736212] [2020-08-18 17:53:39,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-18 17:53:39,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:39,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-18 17:53:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 17:53:39,592 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-08-18 17:53:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:40,843 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-18 17:53:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-18 17:53:40,845 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-08-18 17:53:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:40,847 INFO L225 Difference]: With dead ends: 94 [2020-08-18 17:53:40,847 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 17:53:40,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 17:53:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 17:53:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-18 17:53:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 17:53:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-18 17:53:40,852 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-18 17:53:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:40,853 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-18 17:53:40,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-18 17:53:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-18 17:53:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-18 17:53:40,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:40,855 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:40,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 17:53:40,855 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-18 17:53:40,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:40,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056128778] [2020-08-18 17:53:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:40,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:40,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-18 17:53:43,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056128778] [2020-08-18 17:53:43,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:43,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-18 17:53:43,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074011193] [2020-08-18 17:53:43,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-18 17:53:43,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:43,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-18 17:53:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 17:53:43,591 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-18 17:53:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,888 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-18 17:53:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-18 17:53:44,889 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-18 17:53:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,891 INFO L225 Difference]: With dead ends: 97 [2020-08-18 17:53:44,891 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 17:53:44,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 17:53:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 17:53:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-18 17:53:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 17:53:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-18 17:53:44,898 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-18 17:53:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,898 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-18 17:53:44,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-18 17:53:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-18 17:53:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-18 17:53:44,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,900 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 17:53:44,900 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-18 17:53:44,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12774701] [2020-08-18 17:53:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-18 17:53:47,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12774701] [2020-08-18 17:53:47,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:47,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-18 17:53:47,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147337990] [2020-08-18 17:53:47,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-18 17:53:47,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-18 17:53:47,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-18 17:53:47,947 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 57 states. [2020-08-18 17:53:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,422 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-18 17:53:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-18 17:53:49,423 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-08-18 17:53:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,425 INFO L225 Difference]: With dead ends: 100 [2020-08-18 17:53:49,425 INFO L226 Difference]: Without dead ends: 96 [2020-08-18 17:53:49,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-18 17:53:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-18 17:53:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-18 17:53:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 17:53:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-18 17:53:49,433 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2020-08-18 17:53:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,433 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-18 17:53:49,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-18 17:53:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-18 17:53:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-18 17:53:49,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,435 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 17:53:49,435 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2020-08-18 17:53:49,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552191807] [2020-08-18 17:53:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:51,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-08-18 17:53:52,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552191807] [2020-08-18 17:53:52,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:53:52,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-18 17:53:52,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811421710] [2020-08-18 17:53:52,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-18 17:53:52,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:52,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-18 17:53:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-18 17:53:52,788 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 59 states. [2020-08-18 17:53:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:54,431 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-08-18 17:53:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-18 17:53:54,431 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2020-08-18 17:53:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:54,433 INFO L225 Difference]: With dead ends: 103 [2020-08-18 17:53:54,433 INFO L226 Difference]: Without dead ends: 99 [2020-08-18 17:53:54,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-18 17:53:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-18 17:53:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-18 17:53:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 17:53:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-18 17:53:54,440 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 175 [2020-08-18 17:53:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:54,440 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-18 17:53:54,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-18 17:53:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-18 17:53:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-18 17:53:54,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:54,442 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:54,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 17:53:54,442 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1463833859, now seen corresponding path program 28 times [2020-08-18 17:53:54,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:54,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698116113] [2020-08-18 17:53:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:54,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:54,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:53:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:54,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:53:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:54,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2