/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:56:36,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:56:36,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:56:36,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:56:36,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:56:36,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:56:36,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:56:36,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:56:36,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:56:36,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:56:36,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:56:36,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:56:36,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:56:36,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:56:36,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:56:36,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:56:36,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:56:36,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:56:36,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:56:36,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:56:36,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:56:36,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:56:36,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:56:36,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:56:36,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:56:36,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:56:36,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:56:36,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:56:36,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:56:36,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:56:36,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:56:36,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:56:36,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:56:36,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:56:36,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:56:36,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:56:36,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:56:36,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:56:36,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:56:36,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:56:36,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:56:36,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:56:37,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:56:37,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:56:37,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:56:37,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:56:37,019 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:56:37,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:56:37,019 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:56:37,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:56:37,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:56:37,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:56:37,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:56:37,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:56:37,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:56:37,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:56:37,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:56:37,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:56:37,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:56:37,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:56:37,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:56:37,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:56:37,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:56:37,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:56:37,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:56:37,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:56:37,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:56:37,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:56:37,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:56:37,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:56:37,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:56:37,025 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 15:56:37,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:56:37,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:56:37,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:56:37,533 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:56:37,534 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:56:37,536 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-09-24 15:56:37,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f01a617c0/c5affdbfb8f24f2d96b4ab14aadd433d/FLAG3cd6588b7 [2020-09-24 15:56:38,219 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:56:38,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-09-24 15:56:38,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f01a617c0/c5affdbfb8f24f2d96b4ab14aadd433d/FLAG3cd6588b7 [2020-09-24 15:56:38,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f01a617c0/c5affdbfb8f24f2d96b4ab14aadd433d [2020-09-24 15:56:38,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:56:38,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:56:38,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:56:38,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:56:38,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:56:38,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112bbb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38, skipping insertion in model container [2020-09-24 15:56:38,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:56:38,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:56:38,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:56:38,830 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:56:38,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:56:38,873 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:56:38,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38 WrapperNode [2020-09-24 15:56:38,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:56:38,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:56:38,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:56:38,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:56:38,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... [2020-09-24 15:56:38,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:56:38,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:56:38,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:56:38,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:56:38,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:56:39,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:56:39,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:56:39,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-09-24 15:56:39,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:56:39,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:56:39,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:56:39,070 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-09-24 15:56:39,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:56:39,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:56:39,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:56:39,327 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:56:39,328 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 15:56:39,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:56:39 BoogieIcfgContainer [2020-09-24 15:56:39,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:56:39,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:56:39,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:56:39,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:56:39,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:56:38" (1/3) ... [2020-09-24 15:56:39,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39de937d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:56:39, skipping insertion in model container [2020-09-24 15:56:39,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:56:38" (2/3) ... [2020-09-24 15:56:39,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39de937d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:56:39, skipping insertion in model container [2020-09-24 15:56:39,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:56:39" (3/3) ... [2020-09-24 15:56:39,344 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-09-24 15:56:39,358 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:56:39,372 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:56:39,398 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:56:39,447 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:56:39,447 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:56:39,447 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:56:39,447 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:56:39,447 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:56:39,448 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:56:39,448 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:56:39,448 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:56:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-24 15:56:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 15:56:39,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:39,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:39,489 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times [2020-09-24 15:56:39,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:39,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377101435] [2020-09-24 15:56:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:39,717 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-24 15:56:39,717 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -2 [2020-09-24 15:56:39,718 FATAL L256 erpolLogProxyWrapper]: Difference in width: 2 [2020-09-24 15:56:39,718 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:39,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 15:56:39,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:39,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 15:56:39,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:39,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 15:56:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 15:56:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 15:56:39,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:39,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:39,815 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:39,815 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:39,815 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:39,816 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:39,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:39,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:39,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:39,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:39,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:39,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:39,845 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:39,846 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:39,846 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:39,846 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:39,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:39,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:39,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 15:56:39,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:39,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 15:56:39,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:39,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:39,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:56:39,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377101435] [2020-09-24 15:56:39,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:39,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:56:39,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127932787] [2020-09-24 15:56:39,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:56:39,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:56:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:56:39,935 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 6 states. [2020-09-24 15:56:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:40,201 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-09-24 15:56:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:56:40,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-24 15:56:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:40,218 INFO L225 Difference]: With dead ends: 59 [2020-09-24 15:56:40,219 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 15:56:40,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:56:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 15:56:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-24 15:56:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-24 15:56:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-09-24 15:56:40,288 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2020-09-24 15:56:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:40,289 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-09-24 15:56:40,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:56:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-09-24 15:56:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 15:56:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:40,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:40,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:56:40,295 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:40,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times [2020-09-24 15:56:40,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:40,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232782999] [2020-09-24 15:56:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:40,355 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:40,356 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:40,356 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:40,356 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:40,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 15:56:40,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:40,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-24 15:56:40,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:40,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 15:56:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 15:56:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 15:56:40,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:40,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:40,405 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:40,406 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:40,406 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:40,406 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:40,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:40,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:40,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:40,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:40,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:40,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:40,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:40,436 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:40,436 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:40,436 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:40,436 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:40,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:40,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:40,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 15:56:40,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 15:56:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 15:56:40,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:40,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:40,511 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:40,511 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:40,512 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:40,512 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:40,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:40,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:40,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 15:56:40,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:40,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 15:56:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:40,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:40,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 15:56:40,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232782999] [2020-09-24 15:56:40,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:56:40,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:56:40,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026448226] [2020-09-24 15:56:40,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:56:40,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:56:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:56:40,624 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 8 states. [2020-09-24 15:56:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:40,959 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-24 15:56:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:56:40,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-24 15:56:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:40,964 INFO L225 Difference]: With dead ends: 50 [2020-09-24 15:56:40,964 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 15:56:40,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:56:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 15:56:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 15:56:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 15:56:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-09-24 15:56:40,988 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-09-24 15:56:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:40,989 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-09-24 15:56:40,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:56:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-09-24 15:56:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 15:56:40,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:40,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:40,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:56:40,996 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:40,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2094172607, now seen corresponding path program 1 times [2020-09-24 15:56:40,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:40,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909196872] [2020-09-24 15:56:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,052 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,052 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,052 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,053 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 15:56:41,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 15:56:41,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 15:56:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 15:56:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 15:56:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:41,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,073 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,073 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,073 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,074 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:41,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:41,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:41,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,092 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,092 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,092 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,092 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 15:56:41,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 15:56:41,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 15:56:41,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-24 15:56:41,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 15:56:41,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:41,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,120 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,121 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,121 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,121 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:41,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 15:56:41,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 15:56:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 15:56:41,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 15:56:41,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:41,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,151 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,151 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,151 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,152 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:41,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:41,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-24 15:56:41,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:41,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 15:56:41,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909196872] [2020-09-24 15:56:41,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:56:41,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:56:41,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131908815] [2020-09-24 15:56:41,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:56:41,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:56:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:56:41,164 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2020-09-24 15:56:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:41,237 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-09-24 15:56:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:56:41,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-09-24 15:56:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:41,240 INFO L225 Difference]: With dead ends: 73 [2020-09-24 15:56:41,240 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 15:56:41,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:56:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 15:56:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-24 15:56:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 15:56:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-09-24 15:56:41,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 43 [2020-09-24 15:56:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:41,252 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-09-24 15:56:41,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:56:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-09-24 15:56:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 15:56:41,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:41,256 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:41,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:56:41,256 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:41,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1685750542, now seen corresponding path program 1 times [2020-09-24 15:56:41,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:41,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268533814] [2020-09-24 15:56:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,340 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,340 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,340 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,341 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 15:56:41,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 15:56:41,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 15:56:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-24 15:56:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 15:56:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 15:56:41,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,399 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,399 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,399 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,400 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:41,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:41,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:41,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:41,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:41,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,443 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,443 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,443 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 15:56:41,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 15:56:41,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 15:56:41,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 15:56:41,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:41,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,513 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,514 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,514 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,514 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:41,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 15:56:41,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 15:56:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 15:56:41,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:41,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,555 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:41,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 15:56:41,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 15:56:41,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:41,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:41,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 15:56:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:41,601 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:41,602 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:41,602 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:41,602 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:41,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:41,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:41,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 15:56:41,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 15:56:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:41,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 15:56:41,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268533814] [2020-09-24 15:56:41,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:56:41,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:56:41,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797461160] [2020-09-24 15:56:41,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:56:41,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:41,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:56:41,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:56:41,635 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 12 states. [2020-09-24 15:56:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:42,009 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-09-24 15:56:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:56:42,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-24 15:56:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:42,012 INFO L225 Difference]: With dead ends: 69 [2020-09-24 15:56:42,012 INFO L226 Difference]: Without dead ends: 63 [2020-09-24 15:56:42,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:56:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-24 15:56:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-09-24 15:56:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 15:56:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-09-24 15:56:42,028 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 53 [2020-09-24 15:56:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:42,029 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-09-24 15:56:42,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:56:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2020-09-24 15:56:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 15:56:42,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:42,032 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:42,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:56:42,033 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash 358541405, now seen corresponding path program 2 times [2020-09-24 15:56:42,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:42,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471898589] [2020-09-24 15:56:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,070 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,070 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,071 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,071 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 15:56:42,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 15:56:42,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 15:56:42,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 15:56:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 15:56:42,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,118 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,118 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,119 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,119 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:42,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:42,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:42,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,177 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,177 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,177 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,178 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 15:56:42,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 15:56:42,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 15:56:42,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 15:56:42,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 15:56:42,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,219 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,219 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,220 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,221 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:42,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 15:56:42,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 15:56:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 15:56:42,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,279 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,279 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,279 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,282 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:42,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 15:56:42,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 15:56:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:42,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 15:56:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,326 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,327 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,327 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,327 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:42,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 15:56:42,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 15:56:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 15:56:42,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 15:56:42,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,362 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,362 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,363 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,363 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:42,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 15:56:42,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 15:56:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:42,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-24 15:56:42,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471898589] [2020-09-24 15:56:42,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:56:42,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:56:42,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608874766] [2020-09-24 15:56:42,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:56:42,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:56:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:56:42,379 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 9 states. [2020-09-24 15:56:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:42,514 INFO L93 Difference]: Finished difference Result 125 states and 192 transitions. [2020-09-24 15:56:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:56:42,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-09-24 15:56:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:42,517 INFO L225 Difference]: With dead ends: 125 [2020-09-24 15:56:42,517 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 15:56:42,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:56:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 15:56:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-24 15:56:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 15:56:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2020-09-24 15:56:42,536 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 63 [2020-09-24 15:56:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:42,536 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2020-09-24 15:56:42,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:56:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2020-09-24 15:56:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 15:56:42,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:42,540 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:42,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:56:42,540 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:42,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1096450289, now seen corresponding path program 3 times [2020-09-24 15:56:42,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:42,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120889708] [2020-09-24 15:56:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,631 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,631 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,632 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,632 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 15:56:42,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 15:56:42,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 15:56:42,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-24 15:56:42,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 15:56:42,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,667 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,668 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,668 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,668 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:42,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:42,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:42,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,710 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,710 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,710 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,710 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 15:56:42,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 15:56:42,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 15:56:42,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 15:56:42,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,770 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,771 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,771 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,771 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 15:56:42,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 15:56:42,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 15:56:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 15:56:42,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,816 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,817 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,817 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,817 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:42,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 15:56:42,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 15:56:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 15:56:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:42,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,859 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,860 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,860 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,860 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:42,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 15:56:42,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 15:56:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:42,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 29 [2020-09-24 15:56:42,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 15:56:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:42,938 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:42,938 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:42,939 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:42,939 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:42,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:42,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 15:56:42,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 15:56:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:42,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 15:56:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 15:56:42,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120889708] [2020-09-24 15:56:42,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:56:42,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:56:42,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388325664] [2020-09-24 15:56:42,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:56:42,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:56:42,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:56:42,959 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand 12 states. [2020-09-24 15:56:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:43,340 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2020-09-24 15:56:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 15:56:43,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-09-24 15:56:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:43,349 INFO L225 Difference]: With dead ends: 115 [2020-09-24 15:56:43,350 INFO L226 Difference]: Without dead ends: 109 [2020-09-24 15:56:43,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-09-24 15:56:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-24 15:56:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2020-09-24 15:56:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 15:56:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2020-09-24 15:56:43,389 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 63 [2020-09-24 15:56:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:43,392 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2020-09-24 15:56:43,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:56:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2020-09-24 15:56:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 15:56:43,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:43,398 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:43,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:56:43,399 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash 449882030, now seen corresponding path program 4 times [2020-09-24 15:56:43,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:43,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192161748] [2020-09-24 15:56:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,420 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,420 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,420 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,420 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 15:56:43,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:43,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:43,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-24 15:56:43,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 15:56:43,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,448 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,449 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,449 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,449 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:43,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 15:56:43,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:43,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:43,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,465 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,466 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,466 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,466 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 15:56:43,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:43,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:43,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 15:56:43,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 15:56:43,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,485 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,486 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,486 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,486 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 15:56:43,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 15:56:43,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 15:56:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 15:56:43,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,503 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,503 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,504 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,504 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:43,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 15:56:43,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 15:56:43,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 15:56:43,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 15:56:43,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,525 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,526 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,526 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,526 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:43,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 15:56:43,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 15:56:43,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 15:56:43,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-24 15:56:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,537 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,537 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,537 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,538 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:43,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:43,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:43,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 15:56:43,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:43,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,546 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,547 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,547 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,547 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:43,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 15:56:43,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:43,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:43,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-09-24 15:56:43,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192161748] [2020-09-24 15:56:43,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:56:43,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 15:56:43,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190604178] [2020-09-24 15:56:43,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:56:43,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:56:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:56:43,559 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand 4 states. [2020-09-24 15:56:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:43,612 INFO L93 Difference]: Finished difference Result 144 states and 218 transitions. [2020-09-24 15:56:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:56:43,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-09-24 15:56:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:43,614 INFO L225 Difference]: With dead ends: 144 [2020-09-24 15:56:43,614 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 15:56:43,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:56:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 15:56:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-09-24 15:56:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 15:56:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-09-24 15:56:43,629 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 73 [2020-09-24 15:56:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:43,629 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-09-24 15:56:43,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:56:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-09-24 15:56:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-24 15:56:43,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:56:43,631 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:56:43,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:56:43,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:56:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:56:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash 990403329, now seen corresponding path program 5 times [2020-09-24 15:56:43,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:56:43,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844369822] [2020-09-24 15:56:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:56:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,716 FATAL L256 erpolLogProxyWrapper]: Difference in size: 10 [2020-09-24 15:56:43,717 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,717 FATAL L256 erpolLogProxyWrapper]: Difference in width: 24 [2020-09-24 15:56:43,717 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-24 15:56:43,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 15:56:43,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 15:56:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-24 15:56:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 15:56:43,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:56:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,742 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,743 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,743 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,743 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 15:56:43,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 15:56:43,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 15:56:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:43,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 15:56:43,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 15:56:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,810 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,811 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,811 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,811 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-24 15:56:43,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 15:56:43,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 15:56:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 15:56:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 15:56:43,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,889 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,890 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,890 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,890 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 15:56:43,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 15:56:43,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 15:56:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 15:56:43,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:43,960 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:43,961 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:43,961 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:43,961 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:43,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 15:56:43,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:43,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 15:56:43,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:43,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 15:56:43,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:43,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 15:56:43,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:43,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:44,008 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:44,008 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:44,008 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:44,008 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:44,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:44,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:44,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 15:56:44,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 15:56:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:44,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 15:56:44,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:44,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:44,046 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:44,046 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:44,047 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:44,049 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:44,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:44,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:44,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 15:56:44,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:44,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 15:56:44,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:44,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:44,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:44,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 15:56:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:44,116 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:44,120 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:44,120 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:44,121 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:44,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:44,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:44,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 15:56:44,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 15:56:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 15:56:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:44,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 15:56:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:44,163 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:44,164 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:44,164 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:44,164 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:44,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 15:56:44,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:44,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 15:56:44,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 15:56:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 15:56:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 15:56:44,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:44,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 15:56:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:56:44,191 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 15:56:44,191 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 15:56:44,191 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 15:56:44,191 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 15:56:44,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 15:56:44,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 15:56:44,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 15:56:44,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 15:56:44,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 15:56:44,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 15:56:44,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 15:56:44,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 15:56:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 57 proven. 38 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-24 15:56:44,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844369822] [2020-09-24 15:56:44,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:56:44,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 15:56:44,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917700276] [2020-09-24 15:56:44,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 15:56:44,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:56:44,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 15:56:44,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:56:44,213 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 14 states. [2020-09-24 15:56:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:56:45,180 INFO L93 Difference]: Finished difference Result 139 states and 217 transitions. [2020-09-24 15:56:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 15:56:45,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-09-24 15:56:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:56:45,183 INFO L225 Difference]: With dead ends: 139 [2020-09-24 15:56:45,183 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:56:45,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 15:56:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:56:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:56:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:56:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:56:45,186 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2020-09-24 15:56:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:56:45,186 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:56:45,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 15:56:45,187 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:56:45,187 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:56:45,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:56:45,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:56:45,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 15:56:45,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:56:45,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:56:45,708 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 15:56:45,708 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 15:56:45,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 15:56:45,708 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-09-24 15:56:45,709 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (< 0 ackermann_~m) (<= (+ ackermann_~m 1) 0))) [2020-09-24 15:56:45,709 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-09-24 15:56:45,709 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-09-24 15:56:45,709 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (< 0 ackermann_~m) (<= (+ ackermann_~m 1) 0))) [2020-09-24 15:56:45,710 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= 1 |ackermann_#in~m|)) (.cse1 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= ackermann_~n |ackermann_#in~n|))) (or (and (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse0 .cse1 .cse2) (and (<= 3 |ackermann_#t~ret1|) .cse0 .cse1 .cse2))) [2020-09-24 15:56:45,711 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-09-24 15:56:45,711 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 15:56:45,711 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-09-24 15:56:45,711 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-24 15:56:45,711 INFO L268 CegarLoopResult]: For program point L22-4(line 22) no Hoare annotation was computed. [2020-09-24 15:56:45,712 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 15:56:45,712 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-09-24 15:56:45,712 INFO L268 CegarLoopResult]: For program point L22-5(line 22) no Hoare annotation was computed. [2020-09-24 15:56:45,712 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-09-24 15:56:45,712 INFO L268 CegarLoopResult]: For program point L22-6(line 22) no Hoare annotation was computed. [2020-09-24 15:56:45,712 INFO L268 CegarLoopResult]: For program point L15(lines 15 23) no Hoare annotation was computed. [2020-09-24 15:56:45,712 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-09-24 15:56:45,713 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-24 15:56:45,713 INFO L268 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-09-24 15:56:45,713 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-24 15:56:45,713 INFO L268 CegarLoopResult]: For program point L33-2(line 33) no Hoare annotation was computed. [2020-09-24 15:56:45,713 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-24 15:56:45,714 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-09-24 15:56:45,714 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-09-24 15:56:45,714 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-09-24 15:56:45,715 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-09-24 15:56:45,715 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-24 15:56:45,715 INFO L271 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: true [2020-09-24 15:56:45,715 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-09-24 15:56:45,715 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-09-24 15:56:45,716 INFO L268 CegarLoopResult]: For program point L40-2(line 40) no Hoare annotation was computed. [2020-09-24 15:56:45,716 INFO L268 CegarLoopResult]: For program point L40-3(line 40) no Hoare annotation was computed. [2020-09-24 15:56:45,716 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-09-24 15:56:45,716 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-09-24 15:56:45,717 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-09-24 15:56:45,717 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-09-24 15:56:45,717 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-09-24 15:56:45,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:56:45 BoogieIcfgContainer [2020-09-24 15:56:45,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:56:45,750 INFO L168 Benchmark]: Toolchain (without parser) took 7194.02 ms. Allocated memory was 140.5 MB in the beginning and 286.3 MB in the end (delta: 145.8 MB). Free memory was 103.0 MB in the beginning and 176.1 MB in the end (delta: -73.1 MB). Peak memory consumption was 72.6 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:45,755 INFO L168 Benchmark]: CDTParser took 1.71 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:56:45,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.23 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:45,757 INFO L168 Benchmark]: Boogie Preprocessor took 34.00 ms. Allocated memory is still 140.5 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:45,758 INFO L168 Benchmark]: RCFGBuilder took 424.15 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 169.5 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:45,759 INFO L168 Benchmark]: TraceAbstraction took 6410.92 ms. Allocated memory was 203.9 MB in the beginning and 286.3 MB in the end (delta: 82.3 MB). Free memory was 168.8 MB in the beginning and 176.1 MB in the end (delta: -7.3 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. [2020-09-24 15:56:45,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.71 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.23 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.00 ms. Allocated memory is still 140.5 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 424.15 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 169.5 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6410.92 ms. Allocated memory was 203.9 MB in the beginning and 286.3 MB in the end (delta: 82.3 MB). Free memory was 168.8 MB in the beginning and 176.1 MB in the end (delta: -7.3 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.7s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 275 SDtfs, 310 SDslu, 1055 SDs, 0 SdLazy, 935 SolverSat, 132 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 227 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 38 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 121 PreInvPairs, 141 NumberOfFragments, 71 HoareAnnotationTreeSize, 121 FomulaSimplifications, 348 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 361 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 445 NumberOfCodeBlocks, 445 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 437 ConstructedInterpolants, 0 QuantifiedInterpolants, 52829 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 336/435 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...