/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:54:23,676 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 12:54:23,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:54:23,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:54:23,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:54:23,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:54:23,801 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:54:23,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:54:23,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:54:23,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:54:23,803 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:54:23,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:54:23,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:54:23,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:54:23,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:54:23,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:54:23,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:54:23,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:54:23,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:54:23,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:54:23,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:54:23,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:54:23,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:54:23,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:54:23,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:54:23,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:54:23,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:54:23,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:54:23,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:54:23,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:54:23,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:54:23,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:54:23,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:54:23,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:54:23,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:54:23,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 12:54:24,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:54:24,153 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:54:24,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:54:24,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:54:24,159 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:54:24,160 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-08-18 12:54:24,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/067bba5fd/84ba31eb4dab43a8b6f4a635b202468d/FLAGf37a9106a [2020-08-18 12:54:24,654 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:54:24,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann04.c [2020-08-18 12:54:24,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/067bba5fd/84ba31eb4dab43a8b6f4a635b202468d/FLAGf37a9106a [2020-08-18 12:54:25,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/067bba5fd/84ba31eb4dab43a8b6f4a635b202468d [2020-08-18 12:54:25,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:54:25,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:54:25,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:54:25,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:54:25,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:54:25,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25, skipping insertion in model container [2020-08-18 12:54:25,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:54:25,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:54:25,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:54:25,313 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:54:25,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:54:25,342 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:54:25,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25 WrapperNode [2020-08-18 12:54:25,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:54:25,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:54:25,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:54:25,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:54:25,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... [2020-08-18 12:54:25,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:54:25,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:54:25,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:54:25,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:54:25,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:54:25,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:54:25,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:54:25,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-08-18 12:54:25,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:54:25,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:54:25,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:54:25,522 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-08-18 12:54:25,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:54:25,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:54:25,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:54:25,731 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:54:25,731 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:54:25,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:54:25 BoogieIcfgContainer [2020-08-18 12:54:25,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:54:25,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:54:25,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:54:25,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:54:25,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:54:25" (1/3) ... [2020-08-18 12:54:25,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f295f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:54:25, skipping insertion in model container [2020-08-18 12:54:25,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:54:25" (2/3) ... [2020-08-18 12:54:25,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f295f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:54:25, skipping insertion in model container [2020-08-18 12:54:25,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:54:25" (3/3) ... [2020-08-18 12:54:25,744 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-08-18 12:54:25,755 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:54:25,763 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:54:25,778 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:54:25,832 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:54:25,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:54:25,833 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:54:25,833 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:54:25,833 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:54:25,833 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:54:25,833 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:54:25,834 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:54:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-18 12:54:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 12:54:25,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:25,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:25,867 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-08-18 12:54:25,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:25,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546695351] [2020-08-18 12:54:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:54:26,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546695351] [2020-08-18 12:54:26,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:54:26,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:54:26,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561930004] [2020-08-18 12:54:26,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:54:26,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:54:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:54:26,152 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-18 12:54:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:26,285 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-08-18 12:54:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:54:26,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-18 12:54:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:26,299 INFO L225 Difference]: With dead ends: 55 [2020-08-18 12:54:26,300 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 12:54:26,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:54:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 12:54:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-18 12:54:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 12:54:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-08-18 12:54:26,357 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-08-18 12:54:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:26,358 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-08-18 12:54:26,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:54:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-08-18 12:54:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 12:54:26,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:26,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:26,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:54:26,362 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:26,363 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-08-18 12:54:26,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:26,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077276562] [2020-08-18 12:54:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 12:54:26,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077276562] [2020-08-18 12:54:26,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:26,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:54:26,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802635113] [2020-08-18 12:54:26,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:54:26,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:54:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:54:26,520 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2020-08-18 12:54:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:26,670 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-08-18 12:54:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:54:26,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 12:54:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:26,674 INFO L225 Difference]: With dead ends: 43 [2020-08-18 12:54:26,674 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 12:54:26,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:54:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 12:54:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 12:54:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 12:54:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2020-08-18 12:54:26,689 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 22 [2020-08-18 12:54:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:26,689 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2020-08-18 12:54:26,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:54:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2020-08-18 12:54:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 12:54:26,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:26,692 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:26,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:54:26,693 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:26,693 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-08-18 12:54:26,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:26,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761316817] [2020-08-18 12:54:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 12:54:26,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761316817] [2020-08-18 12:54:26,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:26,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 12:54:26,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287941576] [2020-08-18 12:54:26,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:54:26,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:54:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:54:26,828 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand 4 states. [2020-08-18 12:54:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:26,903 INFO L93 Difference]: Finished difference Result 74 states and 133 transitions. [2020-08-18 12:54:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 12:54:26,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-18 12:54:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:26,907 INFO L225 Difference]: With dead ends: 74 [2020-08-18 12:54:26,907 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 12:54:26,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:54:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 12:54:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-18 12:54:26,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 12:54:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 66 transitions. [2020-08-18 12:54:26,929 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 66 transitions. Word has length 29 [2020-08-18 12:54:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:26,929 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 66 transitions. [2020-08-18 12:54:26,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:54:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-08-18 12:54:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 12:54:26,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:26,932 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:26,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:54:26,933 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 1 times [2020-08-18 12:54:26,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:26,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024656638] [2020-08-18 12:54:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-18 12:54:27,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024656638] [2020-08-18 12:54:27,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:27,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 12:54:27,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021081892] [2020-08-18 12:54:27,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:54:27,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:54:27,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:54:27,146 INFO L87 Difference]: Start difference. First operand 43 states and 66 transitions. Second operand 5 states. [2020-08-18 12:54:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:27,223 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2020-08-18 12:54:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:54:27,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-08-18 12:54:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:27,226 INFO L225 Difference]: With dead ends: 47 [2020-08-18 12:54:27,226 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 12:54:27,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:54:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 12:54:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-18 12:54:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 12:54:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 65 transitions. [2020-08-18 12:54:27,238 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 65 transitions. Word has length 42 [2020-08-18 12:54:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:27,239 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 65 transitions. [2020-08-18 12:54:27,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:54:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 65 transitions. [2020-08-18 12:54:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 12:54:27,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:27,243 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:27,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:54:27,243 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:27,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 2 times [2020-08-18 12:54:27,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:27,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804817830] [2020-08-18 12:54:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-18 12:54:27,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804817830] [2020-08-18 12:54:27,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:27,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 12:54:27,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398279219] [2020-08-18 12:54:27,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 12:54:27,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 12:54:27,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:54:27,573 INFO L87 Difference]: Start difference. First operand 43 states and 65 transitions. Second operand 14 states. [2020-08-18 12:54:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:28,410 INFO L93 Difference]: Finished difference Result 166 states and 476 transitions. [2020-08-18 12:54:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 12:54:28,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-08-18 12:54:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:28,428 INFO L225 Difference]: With dead ends: 166 [2020-08-18 12:54:28,428 INFO L226 Difference]: Without dead ends: 131 [2020-08-18 12:54:28,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=990, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 12:54:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-08-18 12:54:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 69. [2020-08-18 12:54:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 12:54:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 133 transitions. [2020-08-18 12:54:28,504 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 133 transitions. Word has length 62 [2020-08-18 12:54:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:28,505 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 133 transitions. [2020-08-18 12:54:28,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 12:54:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 133 transitions. [2020-08-18 12:54:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-18 12:54:28,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:28,517 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:28,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:54:28,518 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:28,518 INFO L82 PathProgramCache]: Analyzing trace with hash -599460358, now seen corresponding path program 3 times [2020-08-18 12:54:28,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:28,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198832860] [2020-08-18 12:54:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:54:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2020-08-18 12:54:28,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198832860] [2020-08-18 12:54:28,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:28,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:54:28,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839425455] [2020-08-18 12:54:28,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:54:28,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:28,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:54:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:54:28,711 INFO L87 Difference]: Start difference. First operand 69 states and 133 transitions. Second operand 6 states. [2020-08-18 12:54:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:28,824 INFO L93 Difference]: Finished difference Result 113 states and 272 transitions. [2020-08-18 12:54:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:54:28,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-08-18 12:54:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:28,830 INFO L225 Difference]: With dead ends: 113 [2020-08-18 12:54:28,830 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 12:54:28,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:54:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 12:54:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-08-18 12:54:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 12:54:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-08-18 12:54:28,856 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 95 [2020-08-18 12:54:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:28,857 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-08-18 12:54:28,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:54:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-08-18 12:54:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-18 12:54:28,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:28,863 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 18, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:28,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:54:28,863 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash -319737770, now seen corresponding path program 4 times [2020-08-18 12:54:28,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:28,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505876003] [2020-08-18 12:54:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:28,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:54:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:54:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-18 12:54:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:54:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 357 proven. 631 refuted. 0 times theorem prover too weak. 1025 trivial. 0 not checked. [2020-08-18 12:54:29,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505876003] [2020-08-18 12:54:29,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:29,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:54:29,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647783691] [2020-08-18 12:54:29,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:54:29,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:54:29,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:54:29,623 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 9 states. [2020-08-18 12:54:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:29,837 INFO L93 Difference]: Finished difference Result 189 states and 559 transitions. [2020-08-18 12:54:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 12:54:29,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 201 [2020-08-18 12:54:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:29,840 INFO L225 Difference]: With dead ends: 189 [2020-08-18 12:54:29,840 INFO L226 Difference]: Without dead ends: 73 [2020-08-18 12:54:29,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:54:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-18 12:54:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-18 12:54:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 12:54:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 114 transitions. [2020-08-18 12:54:29,855 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 114 transitions. Word has length 201 [2020-08-18 12:54:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:29,855 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 114 transitions. [2020-08-18 12:54:29,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:54:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 114 transitions. [2020-08-18 12:54:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-18 12:54:29,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:29,858 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:29,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:54:29,858 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2010206023, now seen corresponding path program 5 times [2020-08-18 12:54:29,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:29,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970586846] [2020-08-18 12:54:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:29,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 12:54:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 163 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-08-18 12:54:30,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970586846] [2020-08-18 12:54:30,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:30,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 12:54:30,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922804894] [2020-08-18 12:54:30,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 12:54:30,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 12:54:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:54:30,186 INFO L87 Difference]: Start difference. First operand 73 states and 114 transitions. Second operand 16 states. [2020-08-18 12:54:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:31,002 INFO L93 Difference]: Finished difference Result 181 states and 380 transitions. [2020-08-18 12:54:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 12:54:31,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-08-18 12:54:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:31,006 INFO L225 Difference]: With dead ends: 181 [2020-08-18 12:54:31,006 INFO L226 Difference]: Without dead ends: 116 [2020-08-18 12:54:31,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=1424, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 12:54:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-18 12:54:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2020-08-18 12:54:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 12:54:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 126 transitions. [2020-08-18 12:54:31,023 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 126 transitions. Word has length 108 [2020-08-18 12:54:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:31,023 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 126 transitions. [2020-08-18 12:54:31,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 12:54:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 126 transitions. [2020-08-18 12:54:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-18 12:54:31,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:31,026 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:31,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:54:31,026 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 6 times [2020-08-18 12:54:31,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:31,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911434664] [2020-08-18 12:54:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 12:54:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-08-18 12:54:31,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911434664] [2020-08-18 12:54:31,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:31,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 12:54:31,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699615807] [2020-08-18 12:54:31,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 12:54:31,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 12:54:31,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:54:31,392 INFO L87 Difference]: Start difference. First operand 81 states and 126 transitions. Second operand 16 states. [2020-08-18 12:54:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:32,291 INFO L93 Difference]: Finished difference Result 213 states and 430 transitions. [2020-08-18 12:54:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 12:54:32,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 134 [2020-08-18 12:54:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:32,296 INFO L225 Difference]: With dead ends: 213 [2020-08-18 12:54:32,297 INFO L226 Difference]: Without dead ends: 131 [2020-08-18 12:54:32,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 12:54:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-08-18 12:54:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-08-18 12:54:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 12:54:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 151 transitions. [2020-08-18 12:54:32,322 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 151 transitions. Word has length 134 [2020-08-18 12:54:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:32,322 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 151 transitions. [2020-08-18 12:54:32,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 12:54:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 151 transitions. [2020-08-18 12:54:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-18 12:54:32,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:32,327 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:32,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:54:32,327 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 7 times [2020-08-18 12:54:32,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:32,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383579909] [2020-08-18 12:54:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:54:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 12:54:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:54:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-08-18 12:54:32,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383579909] [2020-08-18 12:54:32,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:32,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 12:54:32,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859123936] [2020-08-18 12:54:32,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 12:54:32,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 12:54:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:54:32,947 INFO L87 Difference]: Start difference. First operand 96 states and 151 transitions. Second operand 22 states. [2020-08-18 12:54:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:34,704 INFO L93 Difference]: Finished difference Result 273 states and 544 transitions. [2020-08-18 12:54:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-18 12:54:34,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 160 [2020-08-18 12:54:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:34,709 INFO L225 Difference]: With dead ends: 273 [2020-08-18 12:54:34,709 INFO L226 Difference]: Without dead ends: 185 [2020-08-18 12:54:34,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=894, Invalid=4218, Unknown=0, NotChecked=0, Total=5112 [2020-08-18 12:54:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-18 12:54:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 123. [2020-08-18 12:54:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-18 12:54:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 205 transitions. [2020-08-18 12:54:34,739 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 205 transitions. Word has length 160 [2020-08-18 12:54:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:34,740 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 205 transitions. [2020-08-18 12:54:34,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 12:54:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 205 transitions. [2020-08-18 12:54:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-18 12:54:34,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:34,743 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:34,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:54:34,743 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2020-08-18 12:54:34,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:34,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721820455] [2020-08-18 12:54:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:34,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:34,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:34,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:34,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:34,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:34,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:54:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 12:54:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:54:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 12:54:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-08-18 12:54:35,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721820455] [2020-08-18 12:54:35,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:35,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 12:54:35,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965248946] [2020-08-18 12:54:35,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 12:54:35,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 12:54:35,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-08-18 12:54:35,401 INFO L87 Difference]: Start difference. First operand 123 states and 205 transitions. Second operand 23 states. [2020-08-18 12:54:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:37,195 INFO L93 Difference]: Finished difference Result 324 states and 682 transitions. [2020-08-18 12:54:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-18 12:54:37,196 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 173 [2020-08-18 12:54:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:37,201 INFO L225 Difference]: With dead ends: 324 [2020-08-18 12:54:37,201 INFO L226 Difference]: Without dead ends: 209 [2020-08-18 12:54:37,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1041, Invalid=4965, Unknown=0, NotChecked=0, Total=6006 [2020-08-18 12:54:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-08-18 12:54:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 138. [2020-08-18 12:54:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 12:54:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 238 transitions. [2020-08-18 12:54:37,227 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 238 transitions. Word has length 173 [2020-08-18 12:54:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:37,228 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 238 transitions. [2020-08-18 12:54:37,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 12:54:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 238 transitions. [2020-08-18 12:54:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-18 12:54:37,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:54:37,231 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:54:37,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:54:37,231 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:54:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:54:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 9 times [2020-08-18 12:54:37,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:54:37,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964722290] [2020-08-18 12:54:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:54:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:54:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:54:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:54:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:54:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 12:54:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:54:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:54:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:54:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:54:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 12:54:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-18 12:54:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:54:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-08-18 12:54:37,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964722290] [2020-08-18 12:54:37,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:54:37,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 12:54:37,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179959563] [2020-08-18 12:54:37,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 12:54:37,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:54:37,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 12:54:37,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:54:37,970 INFO L87 Difference]: Start difference. First operand 138 states and 238 transitions. Second operand 25 states. [2020-08-18 12:54:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:54:39,131 INFO L93 Difference]: Finished difference Result 213 states and 357 transitions. [2020-08-18 12:54:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 12:54:39,134 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2020-08-18 12:54:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:54:39,135 INFO L225 Difference]: With dead ends: 213 [2020-08-18 12:54:39,135 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 12:54:39,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=495, Invalid=2367, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 12:54:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 12:54:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 12:54:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 12:54:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 12:54:39,139 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2020-08-18 12:54:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:54:39,139 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 12:54:39,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 12:54:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 12:54:39,140 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 12:54:39,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 12:54:39,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 12:54:39,454 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 56 [2020-08-18 12:54:39,659 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 85 [2020-08-18 12:54:40,099 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 66 [2020-08-18 12:54:40,314 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-08-18 12:54:40,462 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-08-18 12:54:40,674 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 87 [2020-08-18 12:54:40,862 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 89 [2020-08-18 12:54:41,200 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-08-18 12:54:43,629 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 239 DAG size of output: 47 [2020-08-18 12:54:43,751 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 12:54:43,752 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:54:43,752 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:54:43,752 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 12:54:43,752 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 12:54:43,752 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 12:54:43,753 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-08-18 12:54:43,753 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-08-18 12:54:43,753 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (or (and (= |ackermann_#in~n| 1) (not (<= 2 |ackermann_#res|))) (not (= |ackermann_#in~m| 0))) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-18 12:54:43,753 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-08-18 12:54:43,753 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2020-08-18 12:54:43,754 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse6 (<= 5 |ackermann_#t~ret1|)) (.cse4 (<= 3 |ackermann_#t~ret1|)) (.cse2 (<= 6 |ackermann_#t~ret1|)) (.cse3 (<= |ackermann_#in~n| 1)) (.cse8 (<= 1 |ackermann_#in~m|))) (and (let ((.cse0 (<= ackermann_~m 1)) (.cse5 (<= |ackermann_#in~n| 2)) (.cse1 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= 4 |ackermann_#t~ret1|) .cse0 .cse1) (and .cse2 .cse1) (and .cse3 .cse4 .cse1) (and .cse5 .cse0 .cse1) (and (<= |ackermann_#in~m| 2) .cse5 .cse6 .cse1))) (let ((.cse7 (= ackermann_~n |ackermann_#in~n|))) (or (and .cse7 (= |ackermann_#in~m| 0)) (and (<= 2 |ackermann_#t~ret1|) .cse8 .cse7))) (let ((.cse9 (<= 2 |ackermann_#res|))) (or (and (= |ackermann_#in~n| 1) (not .cse9)) (and .cse6 .cse8 (<= |ackermann_#in~n| 4)) (and .cse4 (<= |ackermann_#in~n| 3) .cse8) (and .cse2 .cse8) (and .cse9 .cse3 .cse8))))) [2020-08-18 12:54:43,754 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-18 12:54:43,754 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-08-18 12:54:43,754 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-08-18 12:54:43,755 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-18 12:54:43,755 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-08-18 12:54:43,755 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-08-18 12:54:43,755 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-08-18 12:54:43,755 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-08-18 12:54:43,755 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-08-18 12:54:43,755 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-08-18 12:54:43,755 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-08-18 12:54:43,756 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-08-18 12:54:43,756 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-08-18 12:54:43,756 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-08-18 12:54:43,756 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-08-18 12:54:43,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:54:43 BoogieIcfgContainer [2020-08-18 12:54:43,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:54:43,762 INFO L168 Benchmark]: Toolchain (without parser) took 18694.97 ms. Allocated memory was 139.5 MB in the beginning and 522.7 MB in the end (delta: 383.3 MB). Free memory was 102.4 MB in the beginning and 250.3 MB in the end (delta: -148.0 MB). Peak memory consumption was 362.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:43,763 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 12:54:43,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.31 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:43,765 INFO L168 Benchmark]: Boogie Preprocessor took 108.81 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 180.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:43,765 INFO L168 Benchmark]: RCFGBuilder took 282.86 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:43,766 INFO L168 Benchmark]: TraceAbstraction took 18023.46 ms. Allocated memory was 201.9 MB in the beginning and 522.7 MB in the end (delta: 320.9 MB). Free memory was 166.5 MB in the beginning and 250.3 MB in the end (delta: -83.9 MB). Peak memory consumption was 363.7 MB. Max. memory is 7.1 GB. [2020-08-18 12:54:43,770 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.31 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.81 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 180.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 282.86 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18023.46 ms. Allocated memory was 201.9 MB in the beginning and 522.7 MB in the end (delta: 320.9 MB). Free memory was 166.5 MB in the beginning and 250.3 MB in the end (delta: -83.9 MB). Peak memory consumption was 363.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.3s, OverallIterations: 12, TraceHistogramMax: 29, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 280 SDslu, 1353 SDs, 0 SdLazy, 3757 SolverSat, 927 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 770 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 265 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 605 PreInvPairs, 1445 NumberOfFragments, 152 HoareAnnotationTreeSize, 605 FomulaSimplifications, 1215295 FormulaSimplificationTreeSizeReduction, 2.7s HoareSimplificationTime, 9 FomulaSimplificationsInter, 45624 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1227 NumberOfCodeBlocks, 1227 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1215 ConstructedInterpolants, 0 QuantifiedInterpolants, 313097 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 6526/8398 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...