/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:34,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:34,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:34,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:34,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:34,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:34,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:34,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:34,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:34,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:34,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:34,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:34,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:34,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:34,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:34,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:34,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:34,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:34,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:34,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:34,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:34,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:34,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:34,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:34,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:34,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:34,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:34,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:34,837 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 [2020-09-21 10:20:34,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:34,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:34,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:34,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:34,865 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:34,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:34,866 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:34,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:34,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:34,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:34,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:34,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:34,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:34,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:34,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:34,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:34,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:34,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:34,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:34,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:34,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:34,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:34,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:34,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:34,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:34,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:34,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:34,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:34,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:34,871 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 -> false [2020-09-21 10:20:35,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:35,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:35,380 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:35,381 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:35,382 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:35,383 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-09-21 10:20:35,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b11fad5/c0f62029caa54f20b4635dea79f81b8d/FLAG5046f78c9 [2020-09-21 10:20:35,998 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:35,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-09-21 10:20:36,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b11fad5/c0f62029caa54f20b4635dea79f81b8d/FLAG5046f78c9 [2020-09-21 10:20:36,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b11fad5/c0f62029caa54f20b4635dea79f81b8d [2020-09-21 10:20:36,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:36,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:36,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:36,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:36,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:36,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af20ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36, skipping insertion in model container [2020-09-21 10:20:36,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:36,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:36,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:36,591 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:36,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:36,636 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:36,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36 WrapperNode [2020-09-21 10:20:36,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:36,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:36,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:36,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:36,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (1/1) ... [2020-09-21 10:20:36,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:36,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:36,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:36,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:36,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (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 [2020-09-21 10:20:36,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:36,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:36,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:37,149 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:37,149 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:37,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:37 BoogieIcfgContainer [2020-09-21 10:20:37,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:37,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:37,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:37,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:37,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:36" (1/3) ... [2020-09-21 10:20:37,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aace012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:37, skipping insertion in model container [2020-09-21 10:20:37,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:36" (2/3) ... [2020-09-21 10:20:37,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aace012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:37, skipping insertion in model container [2020-09-21 10:20:37,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:37" (3/3) ... [2020-09-21 10:20:37,164 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-09-21 10:20:37,178 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:37,189 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:37,216 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:37,255 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:37,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:37,256 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:37,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:37,256 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:37,256 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:37,257 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:37,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-21 10:20:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:37,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,293 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] [2020-09-21 10:20:37,293 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,302 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-09-21 10:20:37,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108364151] [2020-09-21 10:20:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108364151] [2020-09-21 10:20:37,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184332208] [2020-09-21 10:20:37,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,608 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-09-21 10:20:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,671 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-09-21 10:20:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,688 INFO L225 Difference]: With dead ends: 93 [2020-09-21 10:20:37,688 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 10:20:37,692 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 [2020-09-21 10:20:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 10:20:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-09-21 10:20:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 10:20:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-09-21 10:20:37,743 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-09-21 10:20:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,744 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-09-21 10:20:37,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-09-21 10:20:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:37,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,746 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] [2020-09-21 10:20:37,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:37,747 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-09-21 10:20:37,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574117650] [2020-09-21 10:20:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574117650] [2020-09-21 10:20:37,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533207963] [2020-09-21 10:20:37,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,825 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-09-21 10:20:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,854 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-09-21 10:20:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:37,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,857 INFO L225 Difference]: With dead ends: 127 [2020-09-21 10:20:37,857 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 10:20:37,859 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 [2020-09-21 10:20:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 10:20:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-21 10:20:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 10:20:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-09-21 10:20:37,874 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-09-21 10:20:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:37,875 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-09-21 10:20:37,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-09-21 10:20:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:37,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:37,878 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] [2020-09-21 10:20:37,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:37,879 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-09-21 10:20:37,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:37,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339198023] [2020-09-21 10:20:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:37,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339198023] [2020-09-21 10:20:37,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:37,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:37,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780294555] [2020-09-21 10:20:37,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:37,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:37,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:37,967 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-09-21 10:20:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:37,997 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-09-21 10:20:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:37,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:37,999 INFO L225 Difference]: With dead ends: 117 [2020-09-21 10:20:37,999 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 10:20:38,000 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 [2020-09-21 10:20:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 10:20:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-09-21 10:20:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 10:20:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-09-21 10:20:38,016 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-09-21 10:20:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,016 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-09-21 10:20:38,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-09-21 10:20:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:38,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,021 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] [2020-09-21 10:20:38,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:38,021 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-09-21 10:20:38,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005320849] [2020-09-21 10:20:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005320849] [2020-09-21 10:20:38,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878366081] [2020-09-21 10:20:38,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,100 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-09-21 10:20:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,125 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-09-21 10:20:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,128 INFO L225 Difference]: With dead ends: 148 [2020-09-21 10:20:38,128 INFO L226 Difference]: Without dead ends: 146 [2020-09-21 10:20:38,129 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 [2020-09-21 10:20:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-21 10:20:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-09-21 10:20:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-21 10:20:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-09-21 10:20:38,144 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-09-21 10:20:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,145 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-09-21 10:20:38,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-09-21 10:20:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:20:38,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,147 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] [2020-09-21 10:20:38,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:38,147 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-09-21 10:20:38,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111423708] [2020-09-21 10:20:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111423708] [2020-09-21 10:20:38,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153703760] [2020-09-21 10:20:38,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,203 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-09-21 10:20:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,236 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-09-21 10:20:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 10:20:38,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,241 INFO L225 Difference]: With dead ends: 244 [2020-09-21 10:20:38,241 INFO L226 Difference]: Without dead ends: 148 [2020-09-21 10:20:38,243 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 [2020-09-21 10:20:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-21 10:20:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-09-21 10:20:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-21 10:20:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-09-21 10:20:38,260 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-09-21 10:20:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,260 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-09-21 10:20:38,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-09-21 10:20:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:38,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,263 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] [2020-09-21 10:20:38,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:38,263 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,264 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-09-21 10:20:38,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364696437] [2020-09-21 10:20:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364696437] [2020-09-21 10:20:38,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272744631] [2020-09-21 10:20:38,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,311 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-09-21 10:20:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,332 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-09-21 10:20:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,334 INFO L225 Difference]: With dead ends: 219 [2020-09-21 10:20:38,335 INFO L226 Difference]: Without dead ends: 150 [2020-09-21 10:20:38,336 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 [2020-09-21 10:20:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-21 10:20:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-09-21 10:20:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-21 10:20:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-09-21 10:20:38,352 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-09-21 10:20:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,353 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-09-21 10:20:38,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-09-21 10:20:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:38,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,357 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] [2020-09-21 10:20:38,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:38,357 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-09-21 10:20:38,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833006952] [2020-09-21 10:20:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833006952] [2020-09-21 10:20:38,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726021030] [2020-09-21 10:20:38,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,452 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-09-21 10:20:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,471 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-09-21 10:20:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,474 INFO L225 Difference]: With dead ends: 276 [2020-09-21 10:20:38,474 INFO L226 Difference]: Without dead ends: 274 [2020-09-21 10:20:38,475 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 [2020-09-21 10:20:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-21 10:20:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-09-21 10:20:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-21 10:20:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-09-21 10:20:38,490 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-09-21 10:20:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,490 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-09-21 10:20:38,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-09-21 10:20:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:20:38,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,493 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] [2020-09-21 10:20:38,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:38,493 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-09-21 10:20:38,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163744289] [2020-09-21 10:20:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163744289] [2020-09-21 10:20:38,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704510219] [2020-09-21 10:20:38,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,529 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-09-21 10:20:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,565 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-09-21 10:20:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 10:20:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,568 INFO L225 Difference]: With dead ends: 472 [2020-09-21 10:20:38,568 INFO L226 Difference]: Without dead ends: 282 [2020-09-21 10:20:38,570 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 [2020-09-21 10:20:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-21 10:20:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-09-21 10:20:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-09-21 10:20:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-09-21 10:20:38,588 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-09-21 10:20:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,588 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-09-21 10:20:38,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-09-21 10:20:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:38,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,590 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] [2020-09-21 10:20:38,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:38,591 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-09-21 10:20:38,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494892760] [2020-09-21 10:20:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494892760] [2020-09-21 10:20:38,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752090525] [2020-09-21 10:20:38,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,627 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-09-21 10:20:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,647 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-09-21 10:20:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,650 INFO L225 Difference]: With dead ends: 420 [2020-09-21 10:20:38,650 INFO L226 Difference]: Without dead ends: 286 [2020-09-21 10:20:38,651 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 [2020-09-21 10:20:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-21 10:20:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-09-21 10:20:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-09-21 10:20:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-09-21 10:20:38,664 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-09-21 10:20:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,664 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-09-21 10:20:38,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-09-21 10:20:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:38,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,667 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] [2020-09-21 10:20:38,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:38,667 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-09-21 10:20:38,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040570807] [2020-09-21 10:20:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040570807] [2020-09-21 10:20:38,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119821233] [2020-09-21 10:20:38,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,707 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-09-21 10:20:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,744 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-09-21 10:20:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,751 INFO L225 Difference]: With dead ends: 524 [2020-09-21 10:20:38,751 INFO L226 Difference]: Without dead ends: 522 [2020-09-21 10:20:38,751 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 [2020-09-21 10:20:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-09-21 10:20:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-09-21 10:20:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-09-21 10:20:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-09-21 10:20:38,778 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-09-21 10:20:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,781 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-09-21 10:20:38,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-09-21 10:20:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:20:38,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,786 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] [2020-09-21 10:20:38,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:38,789 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,790 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-09-21 10:20:38,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386012003] [2020-09-21 10:20:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386012003] [2020-09-21 10:20:38,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095678808] [2020-09-21 10:20:38,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,859 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-09-21 10:20:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,892 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-09-21 10:20:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 10:20:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,896 INFO L225 Difference]: With dead ends: 924 [2020-09-21 10:20:38,896 INFO L226 Difference]: Without dead ends: 546 [2020-09-21 10:20:38,898 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 [2020-09-21 10:20:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-09-21 10:20:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-09-21 10:20:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-09-21 10:20:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-09-21 10:20:38,915 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-09-21 10:20:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:38,916 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-09-21 10:20:38,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-09-21 10:20:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:38,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:38,918 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] [2020-09-21 10:20:38,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:38,918 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-09-21 10:20:38,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:38,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083587116] [2020-09-21 10:20:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:38,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083587116] [2020-09-21 10:20:38,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:38,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:38,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270986681] [2020-09-21 10:20:38,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:38,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:38,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:38,952 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-09-21 10:20:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:38,973 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-09-21 10:20:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:38,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:38,977 INFO L225 Difference]: With dead ends: 816 [2020-09-21 10:20:38,977 INFO L226 Difference]: Without dead ends: 554 [2020-09-21 10:20:38,978 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 [2020-09-21 10:20:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-09-21 10:20:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-09-21 10:20:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-09-21 10:20:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-09-21 10:20:39,000 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-09-21 10:20:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,000 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-09-21 10:20:39,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-09-21 10:20:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:39,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,003 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] [2020-09-21 10:20:39,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:39,003 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-09-21 10:20:39,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574224292] [2020-09-21 10:20:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574224292] [2020-09-21 10:20:39,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577907958] [2020-09-21 10:20:39,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,041 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-09-21 10:20:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,067 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-09-21 10:20:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,075 INFO L225 Difference]: With dead ends: 1004 [2020-09-21 10:20:39,075 INFO L226 Difference]: Without dead ends: 1002 [2020-09-21 10:20:39,076 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 [2020-09-21 10:20:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-09-21 10:20:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-09-21 10:20:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-09-21 10:20:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-09-21 10:20:39,109 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-09-21 10:20:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,110 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-09-21 10:20:39,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-09-21 10:20:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:20:39,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,113 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] [2020-09-21 10:20:39,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:39,113 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-09-21 10:20:39,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220455812] [2020-09-21 10:20:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220455812] [2020-09-21 10:20:39,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091208115] [2020-09-21 10:20:39,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,150 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-09-21 10:20:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,192 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-09-21 10:20:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 10:20:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,201 INFO L225 Difference]: With dead ends: 1820 [2020-09-21 10:20:39,201 INFO L226 Difference]: Without dead ends: 1066 [2020-09-21 10:20:39,204 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 [2020-09-21 10:20:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-09-21 10:20:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-09-21 10:20:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-09-21 10:20:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-09-21 10:20:39,253 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-09-21 10:20:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,253 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-09-21 10:20:39,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-09-21 10:20:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:20:39,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,256 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, 1] [2020-09-21 10:20:39,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:39,256 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-09-21 10:20:39,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531533961] [2020-09-21 10:20:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531533961] [2020-09-21 10:20:39,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136763812] [2020-09-21 10:20:39,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,298 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-09-21 10:20:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,358 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-09-21 10:20:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 10:20:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,365 INFO L225 Difference]: With dead ends: 1596 [2020-09-21 10:20:39,365 INFO L226 Difference]: Without dead ends: 1082 [2020-09-21 10:20:39,368 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 [2020-09-21 10:20:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-09-21 10:20:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-09-21 10:20:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-09-21 10:20:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-09-21 10:20:39,400 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-09-21 10:20:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,401 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-09-21 10:20:39,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-09-21 10:20:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:20:39,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,403 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, 1] [2020-09-21 10:20:39,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:20:39,403 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-09-21 10:20:39,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421514894] [2020-09-21 10:20:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421514894] [2020-09-21 10:20:39,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917194172] [2020-09-21 10:20:39,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,452 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-09-21 10:20:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,491 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-09-21 10:20:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 10:20:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,501 INFO L225 Difference]: With dead ends: 1932 [2020-09-21 10:20:39,501 INFO L226 Difference]: Without dead ends: 1930 [2020-09-21 10:20:39,502 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 [2020-09-21 10:20:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-09-21 10:20:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-09-21 10:20:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-09-21 10:20:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-09-21 10:20:39,549 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-09-21 10:20:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,550 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-09-21 10:20:39,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-09-21 10:20:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:20:39,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,553 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, 1] [2020-09-21 10:20:39,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:20:39,554 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-09-21 10:20:39,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450413010] [2020-09-21 10:20:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450413010] [2020-09-21 10:20:39,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400834661] [2020-09-21 10:20:39,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,588 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-09-21 10:20:39,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,640 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-09-21 10:20:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 10:20:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,650 INFO L225 Difference]: With dead ends: 3596 [2020-09-21 10:20:39,651 INFO L226 Difference]: Without dead ends: 2090 [2020-09-21 10:20:39,655 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 [2020-09-21 10:20:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-09-21 10:20:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-09-21 10:20:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-09-21 10:20:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-09-21 10:20:39,719 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-09-21 10:20:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,719 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-09-21 10:20:39,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-09-21 10:20:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:20:39,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,724 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, 1, 1] [2020-09-21 10:20:39,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:20:39,725 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-09-21 10:20:39,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786965671] [2020-09-21 10:20:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786965671] [2020-09-21 10:20:39,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511690767] [2020-09-21 10:20:39,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,771 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-09-21 10:20:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:39,843 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-09-21 10:20:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:39,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 10:20:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:39,857 INFO L225 Difference]: With dead ends: 3132 [2020-09-21 10:20:39,857 INFO L226 Difference]: Without dead ends: 2122 [2020-09-21 10:20:39,861 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 [2020-09-21 10:20:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-09-21 10:20:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-09-21 10:20:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-09-21 10:20:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-09-21 10:20:39,948 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-09-21 10:20:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:39,949 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-09-21 10:20:39,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-09-21 10:20:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:20:39,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:39,954 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, 1, 1] [2020-09-21 10:20:39,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:20:39,954 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:39,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-09-21 10:20:39,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:39,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453335078] [2020-09-21 10:20:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:39,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453335078] [2020-09-21 10:20:39,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:39,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:39,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351561850] [2020-09-21 10:20:39,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:39,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:39,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:39,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:39,998 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-09-21 10:20:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,092 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-09-21 10:20:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:40,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 10:20:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,110 INFO L225 Difference]: With dead ends: 3724 [2020-09-21 10:20:40,110 INFO L226 Difference]: Without dead ends: 3722 [2020-09-21 10:20:40,111 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 [2020-09-21 10:20:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-09-21 10:20:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-09-21 10:20:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-09-21 10:20:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-09-21 10:20:40,197 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-09-21 10:20:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,197 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-09-21 10:20:40,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-09-21 10:20:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:20:40,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,202 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, 1, 1] [2020-09-21 10:20:40,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:20:40,203 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-09-21 10:20:40,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340830623] [2020-09-21 10:20:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:40,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340830623] [2020-09-21 10:20:40,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:40,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913962772] [2020-09-21 10:20:40,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:40,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:40,242 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-09-21 10:20:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,320 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-09-21 10:20:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:40,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 10:20:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,337 INFO L225 Difference]: With dead ends: 7116 [2020-09-21 10:20:40,338 INFO L226 Difference]: Without dead ends: 4106 [2020-09-21 10:20:40,344 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 [2020-09-21 10:20:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-09-21 10:20:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-09-21 10:20:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-09-21 10:20:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-09-21 10:20:40,468 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-09-21 10:20:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,468 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-09-21 10:20:40,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-09-21 10:20:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:40,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,474 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, 1, 1, 1] [2020-09-21 10:20:40,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:20:40,477 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-09-21 10:20:40,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840276607] [2020-09-21 10:20:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:40,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840276607] [2020-09-21 10:20:40,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:40,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225272051] [2020-09-21 10:20:40,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:40,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:40,511 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-09-21 10:20:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,599 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-09-21 10:20:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:40,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 10:20:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,631 INFO L225 Difference]: With dead ends: 6156 [2020-09-21 10:20:40,631 INFO L226 Difference]: Without dead ends: 4170 [2020-09-21 10:20:40,635 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 [2020-09-21 10:20:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-09-21 10:20:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-09-21 10:20:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-09-21 10:20:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-09-21 10:20:40,745 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-09-21 10:20:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,745 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-09-21 10:20:40,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-09-21 10:20:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:40,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,751 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, 1, 1, 1, 1, 1] [2020-09-21 10:20:40,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:20:40,752 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,752 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-09-21 10:20:40,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572946486] [2020-09-21 10:20:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:40,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572946486] [2020-09-21 10:20:40,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:40,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993252339] [2020-09-21 10:20:40,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:40,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:40,778 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-09-21 10:20:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,887 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-09-21 10:20:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:40,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 10:20:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,904 INFO L225 Difference]: With dead ends: 12108 [2020-09-21 10:20:40,904 INFO L226 Difference]: Without dead ends: 8074 [2020-09-21 10:20:40,914 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 [2020-09-21 10:20:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-09-21 10:20:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-09-21 10:20:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-09-21 10:20:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-09-21 10:20:41,212 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-09-21 10:20:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,212 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-09-21 10:20:41,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-09-21 10:20:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:20:41,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,224 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, 1, 1, 1] [2020-09-21 10:20:41,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:20:41,224 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-09-21 10:20:41,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442015985] [2020-09-21 10:20:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442015985] [2020-09-21 10:20:41,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336083844] [2020-09-21 10:20:41,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,255 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-09-21 10:20:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,441 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-09-21 10:20:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 10:20:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,459 INFO L225 Difference]: With dead ends: 9100 [2020-09-21 10:20:41,459 INFO L226 Difference]: Without dead ends: 9098 [2020-09-21 10:20:41,463 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 [2020-09-21 10:20:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-09-21 10:20:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-09-21 10:20:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-09-21 10:20:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-09-21 10:20:41,665 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-09-21 10:20:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,665 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-09-21 10:20:41,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-09-21 10:20:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:20:41,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,676 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, 1, 1, 1, 1] [2020-09-21 10:20:41,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:20:41,676 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-09-21 10:20:41,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661139405] [2020-09-21 10:20:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661139405] [2020-09-21 10:20:41,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956598846] [2020-09-21 10:20:41,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,728 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-09-21 10:20:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,924 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-09-21 10:20:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 10:20:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,947 INFO L225 Difference]: With dead ends: 13708 [2020-09-21 10:20:41,948 INFO L226 Difference]: Without dead ends: 13706 [2020-09-21 10:20:41,950 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 [2020-09-21 10:20:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-09-21 10:20:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-09-21 10:20:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-09-21 10:20:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-09-21 10:20:42,196 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-09-21 10:20:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,196 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-09-21 10:20:42,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-09-21 10:20:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:20:42,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,215 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, 1, 1, 1, 1] [2020-09-21 10:20:42,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:20:42,216 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-09-21 10:20:42,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527373890] [2020-09-21 10:20:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527373890] [2020-09-21 10:20:42,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583447671] [2020-09-21 10:20:42,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,241 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-09-21 10:20:42,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,430 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-09-21 10:20:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 10:20:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,460 INFO L225 Difference]: With dead ends: 27788 [2020-09-21 10:20:42,461 INFO L226 Difference]: Without dead ends: 15754 [2020-09-21 10:20:42,487 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 [2020-09-21 10:20:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-09-21 10:20:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-09-21 10:20:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-09-21 10:20:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-09-21 10:20:42,893 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-09-21 10:20:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,893 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-09-21 10:20:42,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-09-21 10:20:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:20:42,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,912 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, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:20:42,912 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-09-21 10:20:42,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129617320] [2020-09-21 10:20:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129617320] [2020-09-21 10:20:42,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838210506] [2020-09-21 10:20:42,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,937 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-09-21 10:20:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,103 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-09-21 10:20:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 10:20:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,132 INFO L225 Difference]: With dead ends: 23820 [2020-09-21 10:20:43,132 INFO L226 Difference]: Without dead ends: 16138 [2020-09-21 10:20:43,150 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 [2020-09-21 10:20:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-09-21 10:20:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-09-21 10:20:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-09-21 10:20:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-09-21 10:20:43,557 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-09-21 10:20:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,558 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-09-21 10:20:43,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-09-21 10:20:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:20:43,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,576 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, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:20:43,577 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-09-21 10:20:43,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277625049] [2020-09-21 10:20:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277625049] [2020-09-21 10:20:43,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740068257] [2020-09-21 10:20:43,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,603 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-09-21 10:20:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,859 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-09-21 10:20:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 10:20:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,904 INFO L225 Difference]: With dead ends: 26636 [2020-09-21 10:20:43,905 INFO L226 Difference]: Without dead ends: 26634 [2020-09-21 10:20:43,915 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 [2020-09-21 10:20:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-09-21 10:20:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-09-21 10:20:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-09-21 10:20:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-09-21 10:20:44,887 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-09-21 10:20:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:44,887 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-09-21 10:20:44,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-09-21 10:20:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:20:44,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:44,922 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, 1, 1, 1, 1, 1] [2020-09-21 10:20:44,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 10:20:44,923 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:44,923 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-09-21 10:20:44,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:44,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872712242] [2020-09-21 10:20:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:44,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872712242] [2020-09-21 10:20:44,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:44,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:44,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308613780] [2020-09-21 10:20:44,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:44,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:44,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:44,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:44,952 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-09-21 10:20:45,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:45,362 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-09-21 10:20:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:45,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 10:20:45,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:45,413 INFO L225 Difference]: With dead ends: 55308 [2020-09-21 10:20:45,413 INFO L226 Difference]: Without dead ends: 31242 [2020-09-21 10:20:45,455 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 [2020-09-21 10:20:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-09-21 10:20:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-09-21 10:20:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-09-21 10:20:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-09-21 10:20:45,919 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-09-21 10:20:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:45,919 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-09-21 10:20:45,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-09-21 10:20:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:20:45,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:45,949 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, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:45,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 10:20:45,949 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-09-21 10:20:45,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:45,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084265089] [2020-09-21 10:20:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:45,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084265089] [2020-09-21 10:20:45,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:45,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:45,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198180866] [2020-09-21 10:20:45,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:45,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:45,982 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-09-21 10:20:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:46,443 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-09-21 10:20:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:46,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-21 10:20:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:46,497 INFO L225 Difference]: With dead ends: 46860 [2020-09-21 10:20:46,497 INFO L226 Difference]: Without dead ends: 31754 [2020-09-21 10:20:46,519 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 [2020-09-21 10:20:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-09-21 10:20:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-09-21 10:20:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-09-21 10:20:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-09-21 10:20:46,992 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-09-21 10:20:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:46,993 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-09-21 10:20:46,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-09-21 10:20:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:20:47,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:47,011 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, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:47,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 10:20:47,012 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-09-21 10:20:47,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:47,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634830591] [2020-09-21 10:20:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:47,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634830591] [2020-09-21 10:20:47,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:47,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:47,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794797039] [2020-09-21 10:20:47,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:47,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:47,043 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-09-21 10:20:47,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:47,564 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-09-21 10:20:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:47,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-21 10:20:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:47,613 INFO L225 Difference]: With dead ends: 51210 [2020-09-21 10:20:47,614 INFO L226 Difference]: Without dead ends: 51208 [2020-09-21 10:20:47,623 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 [2020-09-21 10:20:47,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-09-21 10:20:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-09-21 10:20:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-09-21 10:20:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-09-21 10:20:48,197 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-09-21 10:20:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:48,197 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-09-21 10:20:48,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-09-21 10:20:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:20:48,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:48,229 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, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:48,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 10:20:48,229 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-09-21 10:20:48,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:48,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610672561] [2020-09-21 10:20:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:48,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610672561] [2020-09-21 10:20:48,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:48,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:48,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147283173] [2020-09-21 10:20:48,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:48,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:48,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:48,259 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-09-21 10:20:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:49,108 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-09-21 10:20:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:49,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-21 10:20:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:49,110 INFO L225 Difference]: With dead ends: 109576 [2020-09-21 10:20:49,110 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:20:49,202 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 [2020-09-21 10:20:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:20:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:20:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:20:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:20:49,203 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-09-21 10:20:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:49,203 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:20:49,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:20:49,204 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:20:49,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 10:20:49,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:20:49,243 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:20:49,243 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:49,243 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:49,243 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:20:49,243 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:20:49,244 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:20:49,244 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-09-21 10:20:49,244 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-09-21 10:20:49,244 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-09-21 10:20:49,244 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-09-21 10:20:49,244 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-09-21 10:20:49,244 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-09-21 10:20:49,245 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-09-21 10:20:49,246 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-09-21 10:20:49,247 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-09-21 10:20:49,249 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-09-21 10:20:49,249 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,249 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,250 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,251 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,251 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-09-21 10:20:49,251 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-09-21 10:20:49,251 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,251 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 10:20:49,251 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-09-21 10:20:49,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:49 BoogieIcfgContainer [2020-09-21 10:20:49,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:49,279 INFO L168 Benchmark]: Toolchain (without parser) took 12962.25 ms. Allocated memory was 138.4 MB in the beginning and 962.1 MB in the end (delta: 823.7 MB). Free memory was 101.5 MB in the beginning and 442.1 MB in the end (delta: -340.6 MB). Peak memory consumption was 483.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:49,284 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:49,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.64 ms. Allocated memory is still 138.4 MB. Free memory was 100.9 MB in the beginning and 90.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:49,288 INFO L168 Benchmark]: Boogie Preprocessor took 123.07 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 178.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:49,288 INFO L168 Benchmark]: RCFGBuilder took 394.29 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 157.8 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:49,288 INFO L168 Benchmark]: TraceAbstraction took 12119.76 ms. Allocated memory was 200.8 MB in the beginning and 962.1 MB in the end (delta: 761.3 MB). Free memory was 157.1 MB in the beginning and 442.1 MB in the end (delta: -285.0 MB). Peak memory consumption was 476.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:49,290 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.64 ms. Allocated memory is still 138.4 MB. Free memory was 100.9 MB in the beginning and 90.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.07 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 178.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.29 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 157.8 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12119.76 ms. Allocated memory was 200.8 MB in the beginning and 962.1 MB in the end (delta: 761.3 MB). Free memory was 157.1 MB in the beginning and 442.1 MB in the end (delta: -285.0 MB). Peak memory consumption was 476.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...