/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 SequenceOfStatements --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:56:32,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:56:32,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:56:32,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:56:32,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:56:32,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:56:32,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:56:32,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:56:32,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:56:32,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:56:32,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:56:32,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:56:32,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:56:32,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:56:32,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:56:32,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:56:32,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:56:32,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:56:32,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:56:32,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:56:32,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:56:32,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:56:32,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:56:32,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:56:32,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:56:32,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:56:32,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:56:32,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:56:32,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:56:32,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:56:32,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:56:32,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:56:32,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:56:32,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:56:32,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:56:32,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:56:32,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:56:32,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:56:32,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:56:32,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:56:32,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:56:32,995 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 [2020-10-13 14:56:33,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:56:33,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:56:33,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:56:33,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:56:33,020 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:56:33,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:56:33,021 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:56:33,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:56:33,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:56:33,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:56:33,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:56:33,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:56:33,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:56:33,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:56:33,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:56:33,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:56:33,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:56:33,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:56:33,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:56:33,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:56:33,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:56:33,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:56:33,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:56:33,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:56:33,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:56:33,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:56:33,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:56:33,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:56:33,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:56:33,025 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 -> SequenceOfStatements 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;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:56:33,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:56:33,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:56:33,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:56:33,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:56:33,296 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:56:33,297 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:56:33,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ba8e5146/3ee23aa953e44b368ac9f17d5dd1fccb/FLAG43adaddbb [2020-10-13 14:56:33,817 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:56:33,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:56:33,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ba8e5146/3ee23aa953e44b368ac9f17d5dd1fccb/FLAG43adaddbb [2020-10-13 14:56:34,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ba8e5146/3ee23aa953e44b368ac9f17d5dd1fccb [2020-10-13 14:56:34,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:56:34,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:56:34,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:34,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:56:34,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:56:34,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:34,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c8b7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34, skipping insertion in model container [2020-10-13 14:56:34,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:34,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:56:34,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:56:34,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:34,615 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:56:34,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:34,919 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:56:34,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34 WrapperNode [2020-10-13 14:56:34,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:34,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:56:34,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:56:34,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:56:34,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:34,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:34,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:34,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:34,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:35,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:35,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (1/1) ... [2020-10-13 14:56:35,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:56:35,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:56:35,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:56:35,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:56:35,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (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 [2020-10-13 14:56:35,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:56:35,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:56:35,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:56:35,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:56:35,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:56:35,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:56:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:56:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:56:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:56:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:56:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:56:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:56:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:56:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:56:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:56:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:56:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:56:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:56:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:56:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:56:36,454 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:56:36,455 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:56:36,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:36 BoogieIcfgContainer [2020-10-13 14:56:36,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:56:36,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:56:36,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:56:36,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:56:36,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:56:34" (1/3) ... [2020-10-13 14:56:36,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34aa3a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:36, skipping insertion in model container [2020-10-13 14:56:36,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:34" (2/3) ... [2020-10-13 14:56:36,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34aa3a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:36, skipping insertion in model container [2020-10-13 14:56:36,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:36" (3/3) ... [2020-10-13 14:56:36,469 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:56:36,479 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:56:36,487 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:56:36,501 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:56:36,528 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:56:36,528 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:56:36,528 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:56:36,528 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:56:36,529 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:56:36,529 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:56:36,529 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:56:36,529 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:56:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states. [2020-10-13 14:56:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 14:56:36,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:36,571 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:36,572 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash 996963792, now seen corresponding path program 1 times [2020-10-13 14:56:36,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:36,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584548772] [2020-10-13 14:56:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:37,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:38,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:38,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:38,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:40,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:42,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 14:56:42,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:56:42,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 14:56:42,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:42,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:42,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:42,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:56:42,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 14:56:42,681 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:56:42,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:42,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:42,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:42,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:56:42,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:42,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584548772] [2020-10-13 14:56:42,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:42,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:42,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27131895] [2020-10-13 14:56:42,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:42,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:42,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:42,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:42,873 INFO L87 Difference]: Start difference. First operand 342 states. Second operand 5 states. [2020-10-13 14:56:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:46,351 INFO L93 Difference]: Finished difference Result 985 states and 1734 transitions. [2020-10-13 14:56:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:56:46,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-13 14:56:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:46,374 INFO L225 Difference]: With dead ends: 985 [2020-10-13 14:56:46,375 INFO L226 Difference]: Without dead ends: 648 [2020-10-13 14:56:46,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-10-13 14:56:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 646. [2020-10-13 14:56:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-10-13 14:56:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 941 transitions. [2020-10-13 14:56:46,476 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 941 transitions. Word has length 157 [2020-10-13 14:56:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:46,477 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 941 transitions. [2020-10-13 14:56:46,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 941 transitions. [2020-10-13 14:56:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 14:56:46,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:46,487 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:46,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:56:46,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1484768724, now seen corresponding path program 1 times [2020-10-13 14:56:46,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:46,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022299601] [2020-10-13 14:56:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:51,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:51,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 14:56:51,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:56:51,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 14:56:51,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:51,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:51,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:56:51,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:56:51,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:51,817 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:56:51,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:51,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:51,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:51,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:51,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:56:51,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:51,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:51,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:51,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022299601] [2020-10-13 14:56:51,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:51,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:51,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473120339] [2020-10-13 14:56:51,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:51,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:51,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:51,891 INFO L87 Difference]: Start difference. First operand 646 states and 941 transitions. Second operand 4 states. [2020-10-13 14:56:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:54,396 INFO L93 Difference]: Finished difference Result 1892 states and 2753 transitions. [2020-10-13 14:56:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:54,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-10-13 14:56:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:54,404 INFO L225 Difference]: With dead ends: 1892 [2020-10-13 14:56:54,404 INFO L226 Difference]: Without dead ends: 1278 [2020-10-13 14:56:54,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2020-10-13 14:56:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 648. [2020-10-13 14:56:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-10-13 14:56:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 943 transitions. [2020-10-13 14:56:54,449 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 943 transitions. Word has length 158 [2020-10-13 14:56:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:54,449 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 943 transitions. [2020-10-13 14:56:54,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 943 transitions. [2020-10-13 14:56:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 14:56:54,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:54,452 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:54,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:56:54,453 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1395680826, now seen corresponding path program 1 times [2020-10-13 14:56:54,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:54,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911837346] [2020-10-13 14:56:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:54,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:54,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:59,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 14:56:59,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 14:56:59,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:56:59,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:59,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:59,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:59,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:56:59,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:59,786 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:56:59,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:59,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:59,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:59,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:59,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:56:59,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:59,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:59,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911837346] [2020-10-13 14:56:59,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:59,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:59,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399781030] [2020-10-13 14:56:59,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:59,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:59,849 INFO L87 Difference]: Start difference. First operand 648 states and 943 transitions. Second operand 5 states. [2020-10-13 14:57:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:02,562 INFO L93 Difference]: Finished difference Result 1874 states and 2723 transitions. [2020-10-13 14:57:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:02,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-13 14:57:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:02,570 INFO L225 Difference]: With dead ends: 1874 [2020-10-13 14:57:02,571 INFO L226 Difference]: Without dead ends: 1242 [2020-10-13 14:57:02,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-10-13 14:57:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1240. [2020-10-13 14:57:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2020-10-13 14:57:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1785 transitions. [2020-10-13 14:57:02,637 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1785 transitions. Word has length 159 [2020-10-13 14:57:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:02,637 INFO L479 AbstractCegarLoop]: Abstraction has 1240 states and 1785 transitions. [2020-10-13 14:57:02,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1785 transitions. [2020-10-13 14:57:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 14:57:02,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:02,641 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:02,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:57:02,642 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1316932305, now seen corresponding path program 1 times [2020-10-13 14:57:02,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:02,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723648619] [2020-10-13 14:57:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:04,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:07,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 14:57:07,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:57:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:57:07,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:57:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:57:07,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:08,002 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:08,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:08,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:08,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:08,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:08,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:08,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:57:08,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:08,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:08,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723648619] [2020-10-13 14:57:08,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:08,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:08,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779967014] [2020-10-13 14:57:08,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:08,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:08,087 INFO L87 Difference]: Start difference. First operand 1240 states and 1785 transitions. Second operand 5 states. [2020-10-13 14:57:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:09,535 INFO L93 Difference]: Finished difference Result 2159 states and 3103 transitions. [2020-10-13 14:57:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:09,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-13 14:57:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:09,542 INFO L225 Difference]: With dead ends: 2159 [2020-10-13 14:57:09,543 INFO L226 Difference]: Without dead ends: 953 [2020-10-13 14:57:09,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-10-13 14:57:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 952. [2020-10-13 14:57:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2020-10-13 14:57:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1365 transitions. [2020-10-13 14:57:09,612 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1365 transitions. Word has length 159 [2020-10-13 14:57:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:09,612 INFO L479 AbstractCegarLoop]: Abstraction has 952 states and 1365 transitions. [2020-10-13 14:57:09,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1365 transitions. [2020-10-13 14:57:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 14:57:09,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:09,616 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:09,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:57:09,616 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash -221673502, now seen corresponding path program 1 times [2020-10-13 14:57:09,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:09,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943900712] [2020-10-13 14:57:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:09,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:11,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:14,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 14:57:14,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:57:14,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 14:57:14,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:14,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:14,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 14:57:14,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 14:57:14,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,895 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:14,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:14,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:14,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:14,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:14,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:14,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:14,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943900712] [2020-10-13 14:57:14,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:14,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:14,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648315007] [2020-10-13 14:57:14,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:14,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:14,948 INFO L87 Difference]: Start difference. First operand 952 states and 1365 transitions. Second operand 4 states. [2020-10-13 14:57:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:16,730 INFO L93 Difference]: Finished difference Result 2094 states and 3088 transitions. [2020-10-13 14:57:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:16,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-10-13 14:57:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:16,738 INFO L225 Difference]: With dead ends: 2094 [2020-10-13 14:57:16,738 INFO L226 Difference]: Without dead ends: 1331 [2020-10-13 14:57:16,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-10-13 14:57:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1167. [2020-10-13 14:57:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2020-10-13 14:57:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1714 transitions. [2020-10-13 14:57:16,806 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1714 transitions. Word has length 163 [2020-10-13 14:57:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:16,806 INFO L479 AbstractCegarLoop]: Abstraction has 1167 states and 1714 transitions. [2020-10-13 14:57:16,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1714 transitions. [2020-10-13 14:57:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 14:57:16,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:16,809 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:16,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:57:16,810 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash 298142810, now seen corresponding path program 1 times [2020-10-13 14:57:16,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:16,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321365550] [2020-10-13 14:57:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:16,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:16,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:18,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:18,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:21,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:21,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 14:57:21,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:57:21,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 14:57:21,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:21,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:21,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:57:21,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:22,117 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:22,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:22,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:22,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:22,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:22,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:22,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:22,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:22,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321365550] [2020-10-13 14:57:22,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:22,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:22,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675778892] [2020-10-13 14:57:22,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:22,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:22,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:22,179 INFO L87 Difference]: Start difference. First operand 1167 states and 1714 transitions. Second operand 5 states. [2020-10-13 14:57:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:24,654 INFO L93 Difference]: Finished difference Result 3347 states and 4900 transitions. [2020-10-13 14:57:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:24,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-13 14:57:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:24,665 INFO L225 Difference]: With dead ends: 3347 [2020-10-13 14:57:24,666 INFO L226 Difference]: Without dead ends: 2233 [2020-10-13 14:57:24,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2020-10-13 14:57:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2231. [2020-10-13 14:57:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2231 states. [2020-10-13 14:57:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 3243 transitions. [2020-10-13 14:57:24,802 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 3243 transitions. Word has length 166 [2020-10-13 14:57:24,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:24,802 INFO L479 AbstractCegarLoop]: Abstraction has 2231 states and 3243 transitions. [2020-10-13 14:57:24,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:24,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 3243 transitions. [2020-10-13 14:57:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 14:57:24,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:24,808 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:24,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:57:24,808 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 429903532, now seen corresponding path program 1 times [2020-10-13 14:57:24,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:24,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839036932] [2020-10-13 14:57:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:26,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:29,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:30,045 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:30,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:30,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:30,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:30,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:30,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:30,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:30,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:30,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:30,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:30,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:30,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839036932] [2020-10-13 14:57:30,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:30,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:30,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486574748] [2020-10-13 14:57:30,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:30,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:30,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:30,077 INFO L87 Difference]: Start difference. First operand 2231 states and 3243 transitions. Second operand 4 states. [2020-10-13 14:57:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:31,987 INFO L93 Difference]: Finished difference Result 6587 states and 9568 transitions. [2020-10-13 14:57:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:31,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2020-10-13 14:57:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:32,005 INFO L225 Difference]: With dead ends: 6587 [2020-10-13 14:57:32,006 INFO L226 Difference]: Without dead ends: 4418 [2020-10-13 14:57:32,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2020-10-13 14:57:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 2237. [2020-10-13 14:57:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2237 states. [2020-10-13 14:57:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3249 transitions. [2020-10-13 14:57:32,163 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3249 transitions. Word has length 167 [2020-10-13 14:57:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:32,164 INFO L479 AbstractCegarLoop]: Abstraction has 2237 states and 3249 transitions. [2020-10-13 14:57:32,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3249 transitions. [2020-10-13 14:57:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 14:57:32,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:32,168 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:32,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:57:32,169 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash -253585573, now seen corresponding path program 1 times [2020-10-13 14:57:32,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:32,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111224275] [2020-10-13 14:57:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:37,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 14:57:37,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:57:37,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:57:37,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:37,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:37,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 14:57:37,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:57:37,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:37,454 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:37,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:37,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:37,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:37,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:37,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:37,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:37,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:37,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:37,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111224275] [2020-10-13 14:57:37,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:37,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:37,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581388622] [2020-10-13 14:57:37,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:37,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:37,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:37,504 INFO L87 Difference]: Start difference. First operand 2237 states and 3249 transitions. Second operand 5 states. [2020-10-13 14:57:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:38,818 INFO L93 Difference]: Finished difference Result 4418 states and 6416 transitions. [2020-10-13 14:57:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:38,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-13 14:57:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:38,826 INFO L225 Difference]: With dead ends: 4418 [2020-10-13 14:57:38,826 INFO L226 Difference]: Without dead ends: 2237 [2020-10-13 14:57:38,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2020-10-13 14:57:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2230. [2020-10-13 14:57:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2230 states. [2020-10-13 14:57:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 3235 transitions. [2020-10-13 14:57:38,988 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 3235 transitions. Word has length 168 [2020-10-13 14:57:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:38,988 INFO L479 AbstractCegarLoop]: Abstraction has 2230 states and 3235 transitions. [2020-10-13 14:57:38,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 3235 transitions. [2020-10-13 14:57:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 14:57:38,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:38,993 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:38,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:57:38,993 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1189811471, now seen corresponding path program 1 times [2020-10-13 14:57:38,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:38,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724636910] [2020-10-13 14:57:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:39,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:39,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:44,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:44,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 14:57:44,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:57:44,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 14:57:44,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:44,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:57:44,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:44,286 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:44,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:44,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:44,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:44,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:44,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:44,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:44,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:44,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724636910] [2020-10-13 14:57:44,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:44,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:44,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997122401] [2020-10-13 14:57:44,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:44,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:44,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:44,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:44,318 INFO L87 Difference]: Start difference. First operand 2230 states and 3235 transitions. Second operand 5 states. [2020-10-13 14:57:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:45,987 INFO L93 Difference]: Finished difference Result 6417 states and 9278 transitions. [2020-10-13 14:57:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:45,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-13 14:57:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:46,001 INFO L225 Difference]: With dead ends: 6417 [2020-10-13 14:57:46,001 INFO L226 Difference]: Without dead ends: 4263 [2020-10-13 14:57:46,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2020-10-13 14:57:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 4261. [2020-10-13 14:57:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4261 states. [2020-10-13 14:57:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 6101 transitions. [2020-10-13 14:57:46,287 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 6101 transitions. Word has length 168 [2020-10-13 14:57:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:46,287 INFO L479 AbstractCegarLoop]: Abstraction has 4261 states and 6101 transitions. [2020-10-13 14:57:46,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 6101 transitions. [2020-10-13 14:57:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 14:57:46,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:46,295 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:46,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:57:46,296 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash -272907884, now seen corresponding path program 1 times [2020-10-13 14:57:46,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:46,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761128889] [2020-10-13 14:57:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:49,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:51,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 14:57:51,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:57:51,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:57:51,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:57:51,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:57:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:51,556 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:51,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:51,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:51,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:51,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:51,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:51,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:51,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:51,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:51,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:51,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:51,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761128889] [2020-10-13 14:57:51,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:51,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:51,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890218144] [2020-10-13 14:57:51,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:51,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:51,611 INFO L87 Difference]: Start difference. First operand 4261 states and 6101 transitions. Second operand 4 states. [2020-10-13 14:57:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:54,083 INFO L93 Difference]: Finished difference Result 6444 states and 9160 transitions. [2020-10-13 14:57:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:54,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-10-13 14:57:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:54,098 INFO L225 Difference]: With dead ends: 6444 [2020-10-13 14:57:54,098 INFO L226 Difference]: Without dead ends: 4421 [2020-10-13 14:57:54,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2020-10-13 14:57:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 4419. [2020-10-13 14:57:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4419 states. [2020-10-13 14:57:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 6245 transitions. [2020-10-13 14:57:54,353 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 6245 transitions. Word has length 168 [2020-10-13 14:57:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:54,353 INFO L479 AbstractCegarLoop]: Abstraction has 4419 states and 6245 transitions. [2020-10-13 14:57:54,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 6245 transitions. [2020-10-13 14:57:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 14:57:54,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:54,360 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:54,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:57:54,361 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1432956745, now seen corresponding path program 1 times [2020-10-13 14:57:54,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:54,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058246280] [2020-10-13 14:57:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:54,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:55,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:59,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 14:57:59,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:57:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 14:57:59,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:57:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:59,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:59,611 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:57:59,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:59,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:59,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:59,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:59,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:59,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:59,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:59,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058246280] [2020-10-13 14:57:59,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:59,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:59,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838953635] [2020-10-13 14:57:59,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:59,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:59,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:59,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:59,652 INFO L87 Difference]: Start difference. First operand 4419 states and 6245 transitions. Second operand 4 states. [2020-10-13 14:58:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:02,204 INFO L93 Difference]: Finished difference Result 10694 states and 15123 transitions. [2020-10-13 14:58:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:02,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2020-10-13 14:58:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:02,232 INFO L225 Difference]: With dead ends: 10694 [2020-10-13 14:58:02,232 INFO L226 Difference]: Without dead ends: 8699 [2020-10-13 14:58:02,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2020-10-13 14:58:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 4431. [2020-10-13 14:58:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4431 states. [2020-10-13 14:58:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 6257 transitions. [2020-10-13 14:58:02,487 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 6257 transitions. Word has length 169 [2020-10-13 14:58:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:02,487 INFO L479 AbstractCegarLoop]: Abstraction has 4431 states and 6257 transitions. [2020-10-13 14:58:02,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 6257 transitions. [2020-10-13 14:58:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 14:58:02,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:02,495 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:02,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:58:02,496 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1319768616, now seen corresponding path program 1 times [2020-10-13 14:58:02,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:02,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217823472] [2020-10-13 14:58:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:02,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:04,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:04,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:07,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 14:58:07,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:58:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:58:07,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:07,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 14:58:07,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:58:07,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:07,729 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:58:07,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:07,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:07,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:07,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:07,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:07,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:07,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217823472] [2020-10-13 14:58:07,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:07,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:07,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982445620] [2020-10-13 14:58:07,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:07,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:07,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:07,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:07,764 INFO L87 Difference]: Start difference. First operand 4431 states and 6257 transitions. Second operand 4 states. [2020-10-13 14:58:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:09,712 INFO L93 Difference]: Finished difference Result 9941 states and 14536 transitions. [2020-10-13 14:58:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:09,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2020-10-13 14:58:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:09,726 INFO L225 Difference]: With dead ends: 9941 [2020-10-13 14:58:09,726 INFO L226 Difference]: Without dead ends: 6423 [2020-10-13 14:58:09,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6423 states. [2020-10-13 14:58:10,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6423 to 5839. [2020-10-13 14:58:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5839 states. [2020-10-13 14:58:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5839 states to 5839 states and 8497 transitions. [2020-10-13 14:58:10,167 INFO L78 Accepts]: Start accepts. Automaton has 5839 states and 8497 transitions. Word has length 170 [2020-10-13 14:58:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:10,167 INFO L479 AbstractCegarLoop]: Abstraction has 5839 states and 8497 transitions. [2020-10-13 14:58:10,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 5839 states and 8497 transitions. [2020-10-13 14:58:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 14:58:10,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:10,173 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:10,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:58:10,174 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:10,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1675757740, now seen corresponding path program 1 times [2020-10-13 14:58:10,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:10,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162440653] [2020-10-13 14:58:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:10,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:10,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:15,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:15,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 14:58:15,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:58:15,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 14:58:15,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 14:58:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 14:58:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:15,462 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:58:15,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:15,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:15,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:15,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:58:15,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:15,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:15,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162440653] [2020-10-13 14:58:15,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:15,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:15,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394437616] [2020-10-13 14:58:15,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:15,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:15,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:15,517 INFO L87 Difference]: Start difference. First operand 5839 states and 8497 transitions. Second operand 5 states. [2020-10-13 14:58:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:16,926 INFO L93 Difference]: Finished difference Result 7218 states and 10496 transitions. [2020-10-13 14:58:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:16,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-13 14:58:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:16,938 INFO L225 Difference]: With dead ends: 7218 [2020-10-13 14:58:16,938 INFO L226 Difference]: Without dead ends: 4528 [2020-10-13 14:58:16,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2020-10-13 14:58:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 4518. [2020-10-13 14:58:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4518 states. [2020-10-13 14:58:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 6561 transitions. [2020-10-13 14:58:17,264 INFO L78 Accepts]: Start accepts. Automaton has 4518 states and 6561 transitions. Word has length 170 [2020-10-13 14:58:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:17,264 INFO L479 AbstractCegarLoop]: Abstraction has 4518 states and 6561 transitions. [2020-10-13 14:58:17,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4518 states and 6561 transitions. [2020-10-13 14:58:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 14:58:17,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:17,270 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:17,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:58:17,270 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:17,271 INFO L82 PathProgramCache]: Analyzing trace with hash -549378815, now seen corresponding path program 1 times [2020-10-13 14:58:17,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:17,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724884115] [2020-10-13 14:58:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:17,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:18,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:18,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:18,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:18,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:19,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:22,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:22,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-13 14:58:22,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:58:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:58:22,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:58:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:58:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:22,527 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:58:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:22,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:22,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:22,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:22,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:22,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:58:22,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:22,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:22,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:22,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:22,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:22,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724884115] [2020-10-13 14:58:22,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:22,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:22,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917607233] [2020-10-13 14:58:22,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:22,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:22,563 INFO L87 Difference]: Start difference. First operand 4518 states and 6561 transitions. Second operand 4 states. [2020-10-13 14:58:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:24,517 INFO L93 Difference]: Finished difference Result 10546 states and 15839 transitions. [2020-10-13 14:58:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:24,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2020-10-13 14:58:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:24,527 INFO L225 Difference]: With dead ends: 10546 [2020-10-13 14:58:24,527 INFO L226 Difference]: Without dead ends: 6899 [2020-10-13 14:58:24,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2020-10-13 14:58:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6408. [2020-10-13 14:58:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6408 states. [2020-10-13 14:58:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6408 states to 6408 states and 9552 transitions. [2020-10-13 14:58:25,028 INFO L78 Accepts]: Start accepts. Automaton has 6408 states and 9552 transitions. Word has length 172 [2020-10-13 14:58:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:25,029 INFO L479 AbstractCegarLoop]: Abstraction has 6408 states and 9552 transitions. [2020-10-13 14:58:25,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6408 states and 9552 transitions. [2020-10-13 14:58:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 14:58:25,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:25,034 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:25,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:58:25,034 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:25,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1988650749, now seen corresponding path program 1 times [2020-10-13 14:58:25,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:25,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411100704] [2020-10-13 14:58:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:25,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:30,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:30,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 14:58:30,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:58:30,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:58:30,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:58:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 14:58:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:58:30,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:30,303 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:58:30,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:30,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:30,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:30,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:30,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:30,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:30,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:30,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:30,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:30,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411100704] [2020-10-13 14:58:30,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:30,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:58:30,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422341564] [2020-10-13 14:58:30,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:58:30,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:30,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:58:30,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:58:30,337 INFO L87 Difference]: Start difference. First operand 6408 states and 9552 transitions. Second operand 7 states. [2020-10-13 14:58:30,554 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-13 14:58:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:34,392 INFO L93 Difference]: Finished difference Result 43679 states and 67209 transitions. [2020-10-13 14:58:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:58:34,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-10-13 14:58:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:34,448 INFO L225 Difference]: With dead ends: 43679 [2020-10-13 14:58:34,449 INFO L226 Difference]: Without dead ends: 37968 [2020-10-13 14:58:34,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:58:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37968 states. [2020-10-13 14:58:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37968 to 33033. [2020-10-13 14:58:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33033 states. [2020-10-13 14:58:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33033 states to 33033 states and 50471 transitions. [2020-10-13 14:58:36,579 INFO L78 Accepts]: Start accepts. Automaton has 33033 states and 50471 transitions. Word has length 173 [2020-10-13 14:58:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:36,579 INFO L479 AbstractCegarLoop]: Abstraction has 33033 states and 50471 transitions. [2020-10-13 14:58:36,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:58:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 33033 states and 50471 transitions. [2020-10-13 14:58:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 14:58:36,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:36,589 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:36,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:58:36,589 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash -790855768, now seen corresponding path program 1 times [2020-10-13 14:58:36,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:36,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280761774] [2020-10-13 14:58:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:37,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:41,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 14:58:41,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:58:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:58:41,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:58:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:58:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:58:41,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:41,852 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:58:41,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:41,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:41,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:41,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:58:41,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:41,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:41,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:41,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:58:41,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:41,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280761774] [2020-10-13 14:58:41,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:41,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:41,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423543488] [2020-10-13 14:58:41,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:58:41,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:58:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:41,911 INFO L87 Difference]: Start difference. First operand 33033 states and 50471 transitions. Second operand 6 states. [2020-10-13 14:58:42,142 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-13 14:58:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:47,009 INFO L93 Difference]: Finished difference Result 90795 states and 140705 transitions. [2020-10-13 14:58:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:58:47,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2020-10-13 14:58:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:47,083 INFO L225 Difference]: With dead ends: 90795 [2020-10-13 14:58:47,084 INFO L226 Difference]: Without dead ends: 59722 [2020-10-13 14:58:47,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:58:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59722 states. [2020-10-13 14:58:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59722 to 39837. [2020-10-13 14:58:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39837 states. [2020-10-13 14:58:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39837 states to 39837 states and 61506 transitions. [2020-10-13 14:58:49,929 INFO L78 Accepts]: Start accepts. Automaton has 39837 states and 61506 transitions. Word has length 173 [2020-10-13 14:58:49,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:49,930 INFO L479 AbstractCegarLoop]: Abstraction has 39837 states and 61506 transitions. [2020-10-13 14:58:49,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:58:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 39837 states and 61506 transitions. [2020-10-13 14:58:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 14:58:49,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:49,937 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:49,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:58:49,937 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash -415918488, now seen corresponding path program 1 times [2020-10-13 14:58:49,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:49,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59505279] [2020-10-13 14:58:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:49,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:51,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:51,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:52,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:52,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:53,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:54,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 14:58:54,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 14:58:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 14:58:54,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 14:58:54,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:55,252 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:58:55,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:55,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:55,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:55,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:55,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:58:55,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:55,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59505279] [2020-10-13 14:58:55,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:55,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:55,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173826629] [2020-10-13 14:58:55,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:55,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:55,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:55,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:55,302 INFO L87 Difference]: Start difference. First operand 39837 states and 61506 transitions. Second operand 5 states. [2020-10-13 14:59:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:01,938 INFO L93 Difference]: Finished difference Result 95534 states and 147739 transitions. [2020-10-13 14:59:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:01,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-10-13 14:59:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:02,017 INFO L225 Difference]: With dead ends: 95534 [2020-10-13 14:59:02,018 INFO L226 Difference]: Without dead ends: 56717 [2020-10-13 14:59:02,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56717 states. [2020-10-13 14:59:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56717 to 56715. [2020-10-13 14:59:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56715 states. [2020-10-13 14:59:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56715 states to 56715 states and 86389 transitions. [2020-10-13 14:59:07,321 INFO L78 Accepts]: Start accepts. Automaton has 56715 states and 86389 transitions. Word has length 173 [2020-10-13 14:59:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:07,322 INFO L479 AbstractCegarLoop]: Abstraction has 56715 states and 86389 transitions. [2020-10-13 14:59:07,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 56715 states and 86389 transitions. [2020-10-13 14:59:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 14:59:07,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:07,333 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:07,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:59:07,334 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1317075204, now seen corresponding path program 1 times [2020-10-13 14:59:07,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:07,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625358318] [2020-10-13 14:59:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:07,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:07,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:08,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:08,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:08,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:08,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:09,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:12,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:12,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 14:59:12,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:59:12,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 14:59:12,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:59:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 14:59:12,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:12,622 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:59:12,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:12,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:12,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:12,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:12,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:12,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:59:12,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:12,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:12,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:12,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:12,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:12,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625358318] [2020-10-13 14:59:12,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:12,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:12,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728169662] [2020-10-13 14:59:12,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:12,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:12,671 INFO L87 Difference]: Start difference. First operand 56715 states and 86389 transitions. Second operand 4 states. [2020-10-13 14:59:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:21,765 INFO L93 Difference]: Finished difference Result 153421 states and 233643 transitions. [2020-10-13 14:59:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:59:21,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2020-10-13 14:59:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:21,904 INFO L225 Difference]: With dead ends: 153421 [2020-10-13 14:59:21,905 INFO L226 Difference]: Without dead ends: 98364 [2020-10-13 14:59:21,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98364 states. [2020-10-13 14:59:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98364 to 98362. [2020-10-13 14:59:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98362 states. [2020-10-13 14:59:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98362 states to 98362 states and 147731 transitions. [2020-10-13 14:59:31,135 INFO L78 Accepts]: Start accepts. Automaton has 98362 states and 147731 transitions. Word has length 175 [2020-10-13 14:59:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:31,135 INFO L479 AbstractCegarLoop]: Abstraction has 98362 states and 147731 transitions. [2020-10-13 14:59:31,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 98362 states and 147731 transitions. [2020-10-13 14:59:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 14:59:31,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:31,153 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:31,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:59:31,154 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash 866303167, now seen corresponding path program 1 times [2020-10-13 14:59:31,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:31,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776047180] [2020-10-13 14:59:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:31,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:33,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:36,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 14:59:36,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:59:36,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 14:59:36,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:36,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:36,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:59:36,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:59:36,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:36,430 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:59:36,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:36,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:36,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:36,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776047180] [2020-10-13 14:59:36,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:36,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:36,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534519156] [2020-10-13 14:59:36,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:36,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:36,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:36,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:36,463 INFO L87 Difference]: Start difference. First operand 98362 states and 147731 transitions. Second operand 5 states. [2020-10-13 14:59:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:46,386 INFO L93 Difference]: Finished difference Result 186260 states and 279512 transitions. [2020-10-13 14:59:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:46,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2020-10-13 14:59:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:46,524 INFO L225 Difference]: With dead ends: 186260 [2020-10-13 14:59:46,525 INFO L226 Difference]: Without dead ends: 98926 [2020-10-13 14:59:46,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98926 states. [2020-10-13 14:59:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98926 to 98884. [2020-10-13 14:59:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98884 states. [2020-10-13 14:59:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98884 states to 98884 states and 147169 transitions. [2020-10-13 14:59:55,910 INFO L78 Accepts]: Start accepts. Automaton has 98884 states and 147169 transitions. Word has length 175 [2020-10-13 14:59:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:55,910 INFO L479 AbstractCegarLoop]: Abstraction has 98884 states and 147169 transitions. [2020-10-13 14:59:55,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 98884 states and 147169 transitions. [2020-10-13 14:59:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 14:59:55,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:55,926 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, 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, 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, 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, 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] [2020-10-13 14:59:55,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:59:55,926 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1801521148, now seen corresponding path program 1 times [2020-10-13 14:59:55,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:55,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335288083] [2020-10-13 14:59:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:55,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 15:00:00,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:01,166 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 15:00:01,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:01,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:01,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:01,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:01,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:00:01,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:01,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:01,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335288083] [2020-10-13 15:00:01,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:01,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:01,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109417244] [2020-10-13 15:00:01,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:01,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:01,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:01,196 INFO L87 Difference]: Start difference. First operand 98884 states and 147169 transitions. Second operand 4 states. [2020-10-13 15:00:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:12,086 INFO L93 Difference]: Finished difference Result 137659 states and 204422 transitions. [2020-10-13 15:00:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:00:12,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2020-10-13 15:00:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:12,250 INFO L225 Difference]: With dead ends: 137659 [2020-10-13 15:00:12,250 INFO L226 Difference]: Without dead ends: 126533 [2020-10-13 15:00:12,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126533 states.