/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:19:13,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:19:13,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:19:13,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:19:13,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:19:13,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:19:13,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:19:13,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:19:13,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:19:13,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:19:13,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:19:13,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:19:13,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:19:13,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:19:13,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:19:13,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:19:13,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:19:13,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:19:13,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:19:13,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:19:13,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:19:13,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:19:13,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:19:13,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:19:13,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:19:13,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:19:13,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:19:13,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:19:13,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:19:13,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 17:19:13,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:19:13,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:19:13,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:19:13,948 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 17:19:13,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:19:13,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:19:13,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:19:13,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:19:13,977 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:19:13,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:19:13,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:19:13,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:19:13,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:19:13,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:19:13,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:19:13,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:19:13,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:19:13,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:19:13,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:19:13,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:19:13,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:19:13,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:19:13,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:19:13,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:19:13,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:19:13,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:19:13,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:19:13,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:19:13,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:19:13,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:19:13,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:19:13,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:19:13,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:19:13,983 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;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;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;log-additional-information=true; [2020-09-24 17:19:14,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:19:14,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:19:14,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:19:14,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:19:14,507 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:19:14,509 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 17:19:14,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaf2606a0/68dd7175ecae4f49878405eba85d1633/FLAG79eb5f6f7 [2020-09-24 17:19:15,137 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:19:15,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 17:19:15,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaf2606a0/68dd7175ecae4f49878405eba85d1633/FLAG79eb5f6f7 [2020-09-24 17:19:15,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaf2606a0/68dd7175ecae4f49878405eba85d1633 [2020-09-24 17:19:15,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:19:15,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:19:15,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:19:15,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:19:15,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:19:15,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:15,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd6f99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15, skipping insertion in model container [2020-09-24 17:19:15,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:15,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:19:15,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:19:15,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:19:15,853 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:19:15,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:19:15,894 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:19:15,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15 WrapperNode [2020-09-24 17:19:15,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:19:15,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:19:15,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:19:15,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:19:15,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:15,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:15,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:15,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:16,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:16,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:16,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (1/1) ... [2020-09-24 17:19:16,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:19:16,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:19:16,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:19:16,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:19:16,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (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 17:19:16,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:19:16,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:19:16,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:19:16,093 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 17:19:16,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:19:16,093 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 17:19:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:19:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:19:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 17:19:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 17:19:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 17:19:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:19:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:19:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 17:19:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:19:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:19:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:19:16,384 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:19:16,385 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 17:19:16,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:16 BoogieIcfgContainer [2020-09-24 17:19:16,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:19:16,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:19:16,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:19:16,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:19:16,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:19:15" (1/3) ... [2020-09-24 17:19:16,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f5d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:16, skipping insertion in model container [2020-09-24 17:19:16,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:15" (2/3) ... [2020-09-24 17:19:16,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f5d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:16, skipping insertion in model container [2020-09-24 17:19:16,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:16" (3/3) ... [2020-09-24 17:19:16,402 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-24 17:19:16,415 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:19:16,431 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:19:16,473 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:19:16,503 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:19:16,503 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:19:16,503 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:19:16,503 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:19:16,503 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:19:16,503 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:19:16,503 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:19:16,504 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:19:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 17:19:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 17:19:16,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:16,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:16,535 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:16,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-24 17:19:16,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:16,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649284094] [2020-09-24 17:19:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:16,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:16,997 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:16,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 17:19:16,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:16,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-09-24 17:19:17,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:17,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:19:17,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 17:19:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 17:19:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:19:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:17,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:17,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:17,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:19:17,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:17,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:19:17,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:17,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:17,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:17,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:17,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:17,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:19:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:17,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:17,176 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:17,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:19:17,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:17,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 17:19:17,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:19:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:17,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:17,202 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 17:19:17,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649284094] [2020-09-24 17:19:17,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:19:17,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:19:17,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088334681] [2020-09-24 17:19:17,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:19:17,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:19:17,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:19:17,230 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-24 17:19:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:17,520 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-24 17:19:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:19:17,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-24 17:19:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:17,537 INFO L225 Difference]: With dead ends: 109 [2020-09-24 17:19:17,538 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 17:19:17,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:19:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 17:19:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-24 17:19:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 17:19:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 17:19:17,603 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 17:19:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:17,604 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 17:19:17,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:19:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 17:19:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 17:19:17,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:17,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:17,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:19:17,607 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:17,608 INFO L82 PathProgramCache]: Analyzing trace with hash 215899159, now seen corresponding path program 1 times [2020-09-24 17:19:17,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:17,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010828312] [2020-09-24 17:19:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:17,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:18,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,267 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:19,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 17:19:19,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:19:19,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1637 [2020-09-24 17:19:19,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:19:19,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 17:19:19,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 17:19:19,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:19:19,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,471 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:19,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:19:19,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:19,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:19:19,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:19,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:19,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:19,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:19:19,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:19:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,535 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:19,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:19:19,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:19,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 17:19:19,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:19,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:19:19,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010828312] [2020-09-24 17:19:19,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:19:19,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:19:19,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463151137] [2020-09-24 17:19:19,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:19:19,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:19,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:19:19,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:19:19,551 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 11 states. [2020-09-24 17:19:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:20,316 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-09-24 17:19:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 17:19:20,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-09-24 17:19:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:20,322 INFO L225 Difference]: With dead ends: 101 [2020-09-24 17:19:20,322 INFO L226 Difference]: Without dead ends: 99 [2020-09-24 17:19:20,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:19:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-24 17:19:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-24 17:19:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 17:19:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-09-24 17:19:20,354 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 36 [2020-09-24 17:19:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:20,355 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-09-24 17:19:20,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:19:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-09-24 17:19:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:19:20,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:20,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:20,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:19:20,360 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:20,361 INFO L82 PathProgramCache]: Analyzing trace with hash -924714863, now seen corresponding path program 1 times [2020-09-24 17:19:20,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:20,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315133695] [2020-09-24 17:19:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:20,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:21,178 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:21,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:19:21,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:19:21,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-09-24 17:19:21,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:19:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 17:19:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 17:19:21,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:21,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:21,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:21,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:19:21,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:21,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:19:21,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:21,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:21,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:21,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:21,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:21,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:19:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:21,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:21,290 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:21,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:19:21,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 17:19:21,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:21,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:21,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:21,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:19:21,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315133695] [2020-09-24 17:19:21,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:19:21,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:19:21,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917076360] [2020-09-24 17:19:21,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:19:21,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:19:21,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:19:21,303 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 7 states. [2020-09-24 17:19:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:21,574 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2020-09-24 17:19:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:19:21,575 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-24 17:19:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:21,577 INFO L225 Difference]: With dead ends: 130 [2020-09-24 17:19:21,577 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 17:19:21,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:19:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 17:19:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2020-09-24 17:19:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 17:19:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-09-24 17:19:21,589 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 37 [2020-09-24 17:19:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:21,590 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-09-24 17:19:21,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:19:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-09-24 17:19:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 17:19:21,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:21,592 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-09-24 17:19:21,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:19:21,592 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash -435330977, now seen corresponding path program 1 times [2020-09-24 17:19:21,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:21,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70284039] [2020-09-24 17:19:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:21,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:22,829 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:22,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:19:22,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:19:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-09-24 17:19:22,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:19:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 17:19:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 17:19:22,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:22,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:22,897 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:22,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:19:22,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:22,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:19:22,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:22,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:22,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:22,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:22,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:19:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:22,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:22,944 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:22,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:19:22,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:22,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 17:19:22,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:22,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:22,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:22,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:22,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:19:22,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70284039] [2020-09-24 17:19:22,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:19:22,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 17:19:22,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023776413] [2020-09-24 17:19:22,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:19:22,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:22,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:19:22,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:19:22,954 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 9 states. [2020-09-24 17:19:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:23,210 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2020-09-24 17:19:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 17:19:23,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-09-24 17:19:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:23,213 INFO L225 Difference]: With dead ends: 148 [2020-09-24 17:19:23,213 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 17:19:23,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:19:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 17:19:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2020-09-24 17:19:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-24 17:19:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-09-24 17:19:23,226 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 44 [2020-09-24 17:19:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:23,227 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-09-24 17:19:23,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:19:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-09-24 17:19:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 17:19:23,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:23,229 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 17:19:23,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:19:23,229 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash -490588975, now seen corresponding path program 2 times [2020-09-24 17:19:23,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:23,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078808302] [2020-09-24 17:19:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:23,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:23,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,890 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:24,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 17:19:24,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:19:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1649 [2020-09-24 17:19:24,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:19:24,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:19:24,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:19:24,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:24,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,934 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:24,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:19:24,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:24,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:19:24,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:24,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:24,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:24,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:19:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:24,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,988 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:24,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 17:19:24,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 17:19:24,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:19:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:19:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:19:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:19:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-24 17:19:25,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078808302] [2020-09-24 17:19:25,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:19:25,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 17:19:25,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137563452] [2020-09-24 17:19:25,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:19:25,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:19:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:19:25,115 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 7 states. [2020-09-24 17:19:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:25,415 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2020-09-24 17:19:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:19:25,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-09-24 17:19:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:25,418 INFO L225 Difference]: With dead ends: 181 [2020-09-24 17:19:25,419 INFO L226 Difference]: Without dead ends: 104 [2020-09-24 17:19:25,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:19:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-24 17:19:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-09-24 17:19:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 17:19:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-09-24 17:19:25,437 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 51 [2020-09-24 17:19:25,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:25,437 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-09-24 17:19:25,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:19:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-09-24 17:19:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-24 17:19:25,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:25,439 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:25,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:19:25,440 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:25,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1237249075, now seen corresponding path program 1 times [2020-09-24 17:19:25,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:25,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183929447] [2020-09-24 17:19:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:25,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:25,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:33,433 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:33,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 17:19:33,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:19:33,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7980 [2020-09-24 17:19:33,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 17:19:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:19:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 17:19:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:33,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:33,559 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:33,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:19:33,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:33,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:19:33,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:33,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:19:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:33,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:33,767 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:33,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 17:19:33,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:33,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-24 17:19:33,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:33,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:19:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:19:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 17:19:34,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183929447] [2020-09-24 17:19:34,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:19:34,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 17:19:34,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099413826] [2020-09-24 17:19:34,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 17:19:34,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:34,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 17:19:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-24 17:19:34,252 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 18 states. [2020-09-24 17:19:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:35,563 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2020-09-24 17:19:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 17:19:35,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-09-24 17:19:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:35,569 INFO L225 Difference]: With dead ends: 149 [2020-09-24 17:19:35,569 INFO L226 Difference]: Without dead ends: 125 [2020-09-24 17:19:35,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 17:19:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-24 17:19:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-09-24 17:19:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-24 17:19:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-09-24 17:19:35,592 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 57 [2020-09-24 17:19:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:35,598 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-09-24 17:19:35,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 17:19:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-09-24 17:19:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 17:19:35,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:35,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1] [2020-09-24 17:19:35,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:19:35,600 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1272330139, now seen corresponding path program 2 times [2020-09-24 17:19:35,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:35,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465279920] [2020-09-24 17:19:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:35,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:38,573 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:38,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:19:38,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:19:38,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2956 [2020-09-24 17:19:38,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:38,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:19:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-24 17:19:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 17:19:38,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:38,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:38,684 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:38,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:19:38,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:38,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:19:38,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:38,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:38,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:38,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:38,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:19:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:38,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:38,778 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:38,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 17:19:38,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:38,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 17:19:38,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:19:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:19:38,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:19:38,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:19:38,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465279920] [2020-09-24 17:19:38,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:19:38,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 17:19:38,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475023190] [2020-09-24 17:19:38,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 17:19:38,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 17:19:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:19:38,857 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 16 states. [2020-09-24 17:19:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:39,312 INFO L93 Difference]: Finished difference Result 244 states and 272 transitions. [2020-09-24 17:19:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 17:19:39,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-09-24 17:19:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:39,314 INFO L225 Difference]: With dead ends: 244 [2020-09-24 17:19:39,314 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 17:19:39,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2020-09-24 17:19:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 17:19:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 122. [2020-09-24 17:19:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-24 17:19:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2020-09-24 17:19:39,332 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 58 [2020-09-24 17:19:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:39,333 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2020-09-24 17:19:39,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 17:19:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2020-09-24 17:19:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 17:19:39,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:39,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:39,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:19:39,340 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:39,340 INFO L82 PathProgramCache]: Analyzing trace with hash -992963967, now seen corresponding path program 3 times [2020-09-24 17:19:39,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:39,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695381345] [2020-09-24 17:19:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:39,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:39,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:39,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:39,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:39,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:40,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:41,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking...