/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:43:49,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:43:49,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:43:49,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 22:43:49,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:43:49,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:43:49,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:43:49,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:43:49,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:43:49,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:43:49,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:43:49,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:43:49,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:43:49,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:43:49,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:43:49,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:43:49,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:43:49,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:43:49,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:43:49,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:43:49,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:43:49,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:43:49,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:43:49,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:43:49,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:43:49,703 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:43:49,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:43:49,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:43:49,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:43:49,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:43:49,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:43:49,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:43:49,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:43:49,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:43:49,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:43:49,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:43:49,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:43:49,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:43:49,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:43:49,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:43:49,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:43:49,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:43:49,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:49,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:43:49,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:43:49,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:43:49,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:43:49,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:43:49,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:43:49,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:43:49,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:43:50,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:43:50,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:43:50,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:43:50,039 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:43:50,040 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:43:50,040 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-18 22:43:50,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8f707a83/d65f2a28f19e458aae6ae35508232a59/FLAGe6c89c22d [2020-08-18 22:43:50,611 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:43:50,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-18 22:43:50,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8f707a83/d65f2a28f19e458aae6ae35508232a59/FLAGe6c89c22d [2020-08-18 22:43:51,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8f707a83/d65f2a28f19e458aae6ae35508232a59 [2020-08-18 22:43:51,033 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:43:51,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:43:51,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:51,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:43:51,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:43:51,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcc6958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51, skipping insertion in model container [2020-08-18 22:43:51,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:43:51,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:43:51,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:51,293 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:43:51,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:51,331 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:43:51,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51 WrapperNode [2020-08-18 22:43:51,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:51,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:43:51,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:43:51,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:43:51,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... [2020-08-18 22:43:51,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:43:51,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:43:51,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:43:51,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:43:51,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:51,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:43:51,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:43:51,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:43:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:43:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:43:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:43:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:43:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:43:51,780 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:43:51,781 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 22:43:51,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:51 BoogieIcfgContainer [2020-08-18 22:43:51,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:43:51,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:43:51,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:43:51,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:43:51,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:51" (1/3) ... [2020-08-18 22:43:51,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48468825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:51, skipping insertion in model container [2020-08-18 22:43:51,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:51" (2/3) ... [2020-08-18 22:43:51,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48468825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:51, skipping insertion in model container [2020-08-18 22:43:51,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:51" (3/3) ... [2020-08-18 22:43:51,797 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-18 22:43:51,811 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:43:51,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:43:51,839 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:43:51,868 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:43:51,869 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:43:51,869 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:43:51,869 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:43:51,869 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:43:51,869 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:43:51,869 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:43:51,870 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:43:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 22:43:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 22:43:51,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:51,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:51,910 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-18 22:43:51,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:51,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709575726] [2020-08-18 22:43:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709575726] [2020-08-18 22:43:52,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887695043] [2020-08-18 22:43:52,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,146 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-18 22:43:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,220 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-18 22:43:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 22:43:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,233 INFO L225 Difference]: With dead ends: 75 [2020-08-18 22:43:52,234 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 22:43:52,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 22:43:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-18 22:43:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 22:43:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-18 22:43:52,284 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-18 22:43:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,284 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-18 22:43:52,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-18 22:43:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 22:43:52,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:43:52,287 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-18 22:43:52,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856707194] [2020-08-18 22:43:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856707194] [2020-08-18 22:43:52,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626181394] [2020-08-18 22:43:52,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,358 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-18 22:43:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,391 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-18 22:43:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 22:43:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,394 INFO L225 Difference]: With dead ends: 97 [2020-08-18 22:43:52,394 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 22:43:52,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 22:43:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-18 22:43:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 22:43:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-18 22:43:52,406 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-18 22:43:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,407 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-18 22:43:52,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-18 22:43:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:43:52,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:43:52,409 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-18 22:43:52,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960688965] [2020-08-18 22:43:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960688965] [2020-08-18 22:43:52,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574018748] [2020-08-18 22:43:52,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,474 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-18 22:43:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,514 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-18 22:43:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 22:43:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,518 INFO L225 Difference]: With dead ends: 90 [2020-08-18 22:43:52,518 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 22:43:52,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 22:43:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-18 22:43:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 22:43:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-18 22:43:52,532 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-18 22:43:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,533 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-18 22:43:52,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-18 22:43:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:43:52,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:43:52,535 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,535 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-18 22:43:52,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938941642] [2020-08-18 22:43:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938941642] [2020-08-18 22:43:52,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337866194] [2020-08-18 22:43:52,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,588 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-18 22:43:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,608 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-18 22:43:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 22:43:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,611 INFO L225 Difference]: With dead ends: 112 [2020-08-18 22:43:52,611 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 22:43:52,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 22:43:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-18 22:43:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-18 22:43:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-18 22:43:52,623 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-18 22:43:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,624 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-18 22:43:52,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-18 22:43:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:43:52,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:43:52,626 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-18 22:43:52,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558321921] [2020-08-18 22:43:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558321921] [2020-08-18 22:43:52,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461575141] [2020-08-18 22:43:52,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,690 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-18 22:43:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,730 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-18 22:43:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 22:43:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,735 INFO L225 Difference]: With dead ends: 184 [2020-08-18 22:43:52,735 INFO L226 Difference]: Without dead ends: 112 [2020-08-18 22:43:52,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-18 22:43:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-18 22:43:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-18 22:43:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-18 22:43:52,753 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-18 22:43:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,753 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-18 22:43:52,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-18 22:43:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:52,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:43:52,764 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-18 22:43:52,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629796202] [2020-08-18 22:43:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629796202] [2020-08-18 22:43:52,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835805290] [2020-08-18 22:43:52,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,845 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-18 22:43:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,869 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-18 22:43:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,872 INFO L225 Difference]: With dead ends: 165 [2020-08-18 22:43:52,872 INFO L226 Difference]: Without dead ends: 114 [2020-08-18 22:43:52,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-18 22:43:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-18 22:43:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-18 22:43:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-18 22:43:52,884 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-18 22:43:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,885 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-18 22:43:52,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-18 22:43:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:52,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:52,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:52,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:43:52,887 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:52,888 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-18 22:43:52,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:52,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712171845] [2020-08-18 22:43:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712171845] [2020-08-18 22:43:52,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:52,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:52,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557172315] [2020-08-18 22:43:52,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:52,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:52,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,926 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-18 22:43:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:52,960 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-18 22:43:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:52,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:52,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:52,964 INFO L225 Difference]: With dead ends: 204 [2020-08-18 22:43:52,964 INFO L226 Difference]: Without dead ends: 202 [2020-08-18 22:43:52,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-18 22:43:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-18 22:43:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-18 22:43:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-18 22:43:52,995 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-18 22:43:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:52,999 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-18 22:43:52,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-18 22:43:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:43:53,002 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-18 22:43:53,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371005607] [2020-08-18 22:43:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371005607] [2020-08-18 22:43:53,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814106725] [2020-08-18 22:43:53,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,078 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-18 22:43:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,105 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-18 22:43:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,107 INFO L225 Difference]: With dead ends: 352 [2020-08-18 22:43:53,107 INFO L226 Difference]: Without dead ends: 210 [2020-08-18 22:43:53,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-18 22:43:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-18 22:43:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-18 22:43:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-18 22:43:53,122 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-18 22:43:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,123 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-18 22:43:53,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-18 22:43:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:43:53,125 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-18 22:43:53,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005150776] [2020-08-18 22:43:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005150776] [2020-08-18 22:43:53,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109598854] [2020-08-18 22:43:53,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,154 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-18 22:43:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,172 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 22:43:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,174 INFO L225 Difference]: With dead ends: 312 [2020-08-18 22:43:53,175 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 22:43:53,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 22:43:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-18 22:43:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-18 22:43:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-18 22:43:53,187 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-18 22:43:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,187 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-18 22:43:53,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-18 22:43:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:53,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:43:53,189 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-18 22:43:53,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729142926] [2020-08-18 22:43:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729142926] [2020-08-18 22:43:53,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454239769] [2020-08-18 22:43:53,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,235 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-18 22:43:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,256 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-18 22:43:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,259 INFO L225 Difference]: With dead ends: 380 [2020-08-18 22:43:53,259 INFO L226 Difference]: Without dead ends: 378 [2020-08-18 22:43:53,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-18 22:43:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-18 22:43:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-18 22:43:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-18 22:43:53,281 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-18 22:43:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,281 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-18 22:43:53,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-18 22:43:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:53,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:43:53,288 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-18 22:43:53,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032063983] [2020-08-18 22:43:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032063983] [2020-08-18 22:43:53,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60506875] [2020-08-18 22:43:53,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,324 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-18 22:43:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,348 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-18 22:43:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,351 INFO L225 Difference]: With dead ends: 684 [2020-08-18 22:43:53,351 INFO L226 Difference]: Without dead ends: 402 [2020-08-18 22:43:53,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-18 22:43:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-18 22:43:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-18 22:43:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-18 22:43:53,369 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-18 22:43:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,369 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-18 22:43:53,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-18 22:43:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:53,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:43:53,371 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-18 22:43:53,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326724412] [2020-08-18 22:43:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326724412] [2020-08-18 22:43:53,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022553683] [2020-08-18 22:43:53,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,397 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-18 22:43:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,416 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-18 22:43:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,420 INFO L225 Difference]: With dead ends: 600 [2020-08-18 22:43:53,420 INFO L226 Difference]: Without dead ends: 410 [2020-08-18 22:43:53,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-18 22:43:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-18 22:43:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-18 22:43:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-18 22:43:53,436 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-18 22:43:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,436 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-18 22:43:53,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-18 22:43:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:53,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:43:53,438 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-18 22:43:53,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294876030] [2020-08-18 22:43:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294876030] [2020-08-18 22:43:53,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856713619] [2020-08-18 22:43:53,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,463 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-18 22:43:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,500 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-18 22:43:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,506 INFO L225 Difference]: With dead ends: 716 [2020-08-18 22:43:53,506 INFO L226 Difference]: Without dead ends: 714 [2020-08-18 22:43:53,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-18 22:43:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-18 22:43:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-18 22:43:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-18 22:43:53,528 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-18 22:43:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,528 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-18 22:43:53,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-18 22:43:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:53,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:43:53,531 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-18 22:43:53,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256365102] [2020-08-18 22:43:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256365102] [2020-08-18 22:43:53,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891229758] [2020-08-18 22:43:53,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,569 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-18 22:43:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,602 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-18 22:43:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,609 INFO L225 Difference]: With dead ends: 1340 [2020-08-18 22:43:53,609 INFO L226 Difference]: Without dead ends: 778 [2020-08-18 22:43:53,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-18 22:43:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-18 22:43:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 22:43:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-18 22:43:53,637 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-18 22:43:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,638 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-18 22:43:53,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-18 22:43:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:53,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:43:53,640 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-18 22:43:53,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220048802] [2020-08-18 22:43:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220048802] [2020-08-18 22:43:53,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550979933] [2020-08-18 22:43:53,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,681 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-18 22:43:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,709 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-18 22:43:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,714 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 22:43:53,715 INFO L226 Difference]: Without dead ends: 794 [2020-08-18 22:43:53,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-18 22:43:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-18 22:43:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-18 22:43:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-18 22:43:53,749 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-18 22:43:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,749 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-18 22:43:53,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-18 22:43:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:53,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:43:53,752 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-18 22:43:53,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60147401] [2020-08-18 22:43:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60147401] [2020-08-18 22:43:53,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146000693] [2020-08-18 22:43:53,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,799 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-18 22:43:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:53,854 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-18 22:43:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:53,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:53,862 INFO L225 Difference]: With dead ends: 1356 [2020-08-18 22:43:53,862 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 22:43:53,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 22:43:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-18 22:43:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-18 22:43:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-18 22:43:53,922 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-18 22:43:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:53,923 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-18 22:43:53,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-18 22:43:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:53,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:53,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:53,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:43:53,926 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:53,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-18 22:43:53,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:53,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421148555] [2020-08-18 22:43:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:53,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421148555] [2020-08-18 22:43:53,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:53,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:53,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924319098] [2020-08-18 22:43:53,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:53,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:53,959 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-18 22:43:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:54,001 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-18 22:43:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:54,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:54,009 INFO L225 Difference]: With dead ends: 2636 [2020-08-18 22:43:54,010 INFO L226 Difference]: Without dead ends: 1514 [2020-08-18 22:43:54,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-18 22:43:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-18 22:43:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-18 22:43:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-18 22:43:54,061 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-18 22:43:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:54,062 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-18 22:43:54,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:54,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-18 22:43:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 22:43:54,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:54,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:54,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:43:54,066 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-18 22:43:54,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:54,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474104267] [2020-08-18 22:43:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:54,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474104267] [2020-08-18 22:43:54,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972126320] [2020-08-18 22:43:54,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,096 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-18 22:43:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:54,134 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-18 22:43:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:54,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 22:43:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:54,142 INFO L225 Difference]: With dead ends: 2268 [2020-08-18 22:43:54,142 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 22:43:54,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 22:43:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-18 22:43:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 22:43:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-18 22:43:54,193 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-18 22:43:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:54,194 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-18 22:43:54,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-18 22:43:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 22:43:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:54,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:54,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:43:54,198 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-18 22:43:54,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:54,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299010224] [2020-08-18 22:43:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:54,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299010224] [2020-08-18 22:43:54,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119323614] [2020-08-18 22:43:54,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,237 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-18 22:43:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:54,313 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-18 22:43:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:54,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 22:43:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:54,328 INFO L225 Difference]: With dead ends: 2572 [2020-08-18 22:43:54,328 INFO L226 Difference]: Without dead ends: 2570 [2020-08-18 22:43:54,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-18 22:43:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-18 22:43:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-18 22:43:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-18 22:43:54,428 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-18 22:43:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:54,429 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-18 22:43:54,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-18 22:43:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 22:43:54,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:54,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:54,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:43:54,436 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-18 22:43:54,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:54,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845972938] [2020-08-18 22:43:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:54,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845972938] [2020-08-18 22:43:54,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554987908] [2020-08-18 22:43:54,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,478 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-18 22:43:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:54,585 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-18 22:43:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:54,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 22:43:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:54,602 INFO L225 Difference]: With dead ends: 5196 [2020-08-18 22:43:54,603 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 22:43:54,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 22:43:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-18 22:43:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-18 22:43:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-18 22:43:54,753 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-18 22:43:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:54,754 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-18 22:43:54,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-18 22:43:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:43:54,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:54,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:54,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:43:54,764 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:54,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:54,764 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-18 22:43:54,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:54,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160387843] [2020-08-18 22:43:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:54,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160387843] [2020-08-18 22:43:54,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206350158] [2020-08-18 22:43:54,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,790 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-18 22:43:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:54,848 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-18 22:43:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:54,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 22:43:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:54,862 INFO L225 Difference]: With dead ends: 4428 [2020-08-18 22:43:54,863 INFO L226 Difference]: Without dead ends: 3018 [2020-08-18 22:43:54,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-18 22:43:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-18 22:43:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-18 22:43:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-18 22:43:54,958 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-18 22:43:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:54,958 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-18 22:43:54,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-18 22:43:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:43:54,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:54,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:54,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:43:54,963 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-18 22:43:54,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:54,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98602369] [2020-08-18 22:43:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:54,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98602369] [2020-08-18 22:43:54,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:54,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:54,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797475200] [2020-08-18 22:43:54,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:54,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:54,999 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-18 22:43:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:55,106 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-18 22:43:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:55,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 22:43:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:55,120 INFO L225 Difference]: With dead ends: 8650 [2020-08-18 22:43:55,120 INFO L226 Difference]: Without dead ends: 3016 [2020-08-18 22:43:55,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-18 22:43:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-18 22:43:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-18 22:43:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-18 22:43:55,261 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-18 22:43:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:55,262 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-18 22:43:55,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-18 22:43:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:43:55,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:55,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:55,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 22:43:55,267 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-18 22:43:55,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:55,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380133068] [2020-08-18 22:43:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:55,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:55,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380133068] [2020-08-18 22:43:55,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:55,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:55,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377534954] [2020-08-18 22:43:55,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:55,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:55,290 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-18 22:43:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:55,343 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-18 22:43:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:55,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 22:43:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:55,344 INFO L225 Difference]: With dead ends: 3016 [2020-08-18 22:43:55,344 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:43:55,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:43:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:43:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:43:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:43:55,350 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-18 22:43:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:55,351 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:43:55,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:43:55,351 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:43:55,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 22:43:55,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:43:55,375 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:43:55,375 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:55,375 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:55,376 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:43:55,376 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:43:55,376 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:43:55,376 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-18 22:43:55,376 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-18 22:43:55,376 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,376 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-18 22:43:55,377 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,377 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-18 22:43:55,377 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,377 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,377 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-18 22:43:55,377 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-18 22:43:55,377 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-18 22:43:55,378 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-18 22:43:55,378 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-18 22:43:55,378 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,378 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,378 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,378 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,378 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-18 22:43:55,378 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,379 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-18 22:43:55,379 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-18 22:43:55,379 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,379 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,379 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-18 22:43:55,379 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-18 22:43:55,379 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,379 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-18 22:43:55,379 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,380 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,380 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-18 22:43:55,380 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-18 22:43:55,380 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 22:43:55,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:43:55 BoogieIcfgContainer [2020-08-18 22:43:55,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:43:55,394 INFO L168 Benchmark]: Toolchain (without parser) took 4359.32 ms. Allocated memory was 144.2 MB in the beginning and 321.9 MB in the end (delta: 177.7 MB). Free memory was 100.1 MB in the beginning and 247.3 MB in the end (delta: -147.1 MB). Peak memory consumption was 30.6 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,395 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 144.2 MB. Free memory was 118.7 MB in the beginning and 118.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.46 ms. Allocated memory is still 144.2 MB. Free memory was 99.7 MB in the beginning and 89.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,396 INFO L168 Benchmark]: Boogie Preprocessor took 119.77 ms. Allocated memory was 144.2 MB in the beginning and 199.2 MB in the end (delta: 55.1 MB). Free memory was 89.4 MB in the beginning and 176.4 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,396 INFO L168 Benchmark]: RCFGBuilder took 334.34 ms. Allocated memory is still 199.2 MB. Free memory was 176.4 MB in the beginning and 159.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,397 INFO L168 Benchmark]: TraceAbstraction took 3604.23 ms. Allocated memory was 199.2 MB in the beginning and 321.9 MB in the end (delta: 122.7 MB). Free memory was 158.2 MB in the beginning and 247.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:55,399 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 144.2 MB. Free memory was 118.7 MB in the beginning and 118.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.46 ms. Allocated memory is still 144.2 MB. Free memory was 99.7 MB in the beginning and 89.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.77 ms. Allocated memory was 144.2 MB in the beginning and 199.2 MB in the end (delta: 55.1 MB). Free memory was 89.4 MB in the beginning and 176.4 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.34 ms. Allocated memory is still 199.2 MB. Free memory was 176.4 MB in the beginning and 159.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3604.23 ms. Allocated memory was 199.2 MB in the beginning and 321.9 MB in the end (delta: 122.7 MB). Free memory was 158.2 MB in the beginning and 247.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...