/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/list-properties/splice-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:35:26,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:35:26,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:35:26,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:35:26,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:35:26,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:35:26,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:35:26,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:35:26,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:35:26,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:35:26,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:35:26,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:35:26,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:35:26,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:35:26,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:35:26,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:35:26,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:35:26,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:35:26,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:35:26,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:35:26,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:35:26,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:35:26,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:35:26,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:35:26,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:35:26,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:35:26,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:35:26,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:35:26,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:35:26,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:35:26,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:35:26,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:35:26,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:35:26,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:35:26,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:35:26,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:35:26,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:35:26,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:35:26,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:35:26,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:35:26,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:35:26,944 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 10:35:26,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:35:26,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:35:26,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:35:26,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:35:26,968 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:35:26,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:35:26,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:35:26,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:35:26,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:35:26,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:35:26,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:35:26,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:35:26,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:35:26,970 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:35:26,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:35:26,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:35:26,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:35:26,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:35:26,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:35:26,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:35:26,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:35:26,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:35:26,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:35:26,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:35:26,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:35:26,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:35:26,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:35:26,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:35:26,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:35:26,973 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 10:35:27,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:35:27,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:35:27,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:35:27,333 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:35:27,333 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:35:27,334 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-2.i [2020-10-13 10:35:27,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3c148ed0/94761efaab7d4f95ac55c96cacf44118/FLAG772587c52 [2020-10-13 10:35:27,934 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:35:27,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-2.i [2020-10-13 10:35:27,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3c148ed0/94761efaab7d4f95ac55c96cacf44118/FLAG772587c52 [2020-10-13 10:35:28,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3c148ed0/94761efaab7d4f95ac55c96cacf44118 [2020-10-13 10:35:28,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:35:28,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:35:28,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:35:28,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:35:28,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:35:28,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:28,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62278a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28, skipping insertion in model container [2020-10-13 10:35:28,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:28,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:35:28,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:35:28,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:35:28,880 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:35:28,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:35:28,980 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:35:28,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28 WrapperNode [2020-10-13 10:35:28,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:35:28,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:35:28,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:35:28,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:35:28,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:28,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:29,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:29,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:29,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:29,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:29,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (1/1) ... [2020-10-13 10:35:29,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:35:29,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:35:29,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:35:29,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:35:29,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (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 10:35:29,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:35:29,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:35:29,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:35:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:35:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-13 10:35:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-13 10:35:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-13 10:35:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:35:29,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:35:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:35:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:35:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:35:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:35:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:35:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:35:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:35:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:35:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:35:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:35:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:35:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:35:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:35:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:35:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:35:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:35:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:35:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:35:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:35:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:35:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-13 10:35:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-13 10:35:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-13 10:35:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:35:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:35:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:35:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:35:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:35:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:35:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:35:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:35:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:35:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:35:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:35:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:35:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:35:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:35:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:35:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:35:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:35:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:35:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:35:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:35:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:35:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:35:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:35:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:35:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:35:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:35:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:35:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:35:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:35:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:35:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:35:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:35:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:35:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:35:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:35:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:35:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:35:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:35:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:35:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:35:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:35:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:35:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:35:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:35:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:35:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:35:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:35:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:35:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:35:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:35:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:35:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:35:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:35:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:35:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:35:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:35:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:35:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:35:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:35:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:35:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:35:29,128 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:35:29,128 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:35:29,128 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:35:29,128 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:35:29,128 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:35:29,128 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:35:29,128 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:35:29,129 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:35:29,130 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:35:29,130 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:35:29,130 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:35:29,130 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:35:29,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:35:29,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:35:29,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:35:29,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:35:29,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:35:29,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:35:29,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:35:29,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:35:29,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:35:29,482 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:35:29,663 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:35:29,663 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 10:35:29,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:35:29 BoogieIcfgContainer [2020-10-13 10:35:29,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:35:29,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:35:29,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:35:29,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:35:29,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:35:28" (1/3) ... [2020-10-13 10:35:29,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca123be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:35:29, skipping insertion in model container [2020-10-13 10:35:29,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:35:28" (2/3) ... [2020-10-13 10:35:29,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca123be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:35:29, skipping insertion in model container [2020-10-13 10:35:29,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:35:29" (3/3) ... [2020-10-13 10:35:29,676 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-2.i [2020-10-13 10:35:29,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:35:29,696 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:35:29,712 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:35:29,741 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:35:29,741 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:35:29,742 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:35:29,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:35:29,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:35:29,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:35:29,743 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:35:29,743 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:35:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-13 10:35:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:35:29,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:29,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:29,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-10-13 10:35:29,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:29,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379653528] [2020-10-13 10:35:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:30,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:30,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:35:30,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:35:30,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-13 10:35:30,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:30,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:30,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:35:30,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:30,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:35:30,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:30,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:30,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:30,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:35:30,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:30,516 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 10:35:30,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379653528] [2020-10-13 10:35:30,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:30,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:35:30,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019154291] [2020-10-13 10:35:30,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:35:30,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:30,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:35:30,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:35:30,545 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-13 10:35:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:30,682 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-10-13 10:35:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:35:30,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 10:35:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:30,696 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:35:30,696 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:35:30,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:35:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:35:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:35:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:35:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-13 10:35:30,752 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2020-10-13 10:35:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:30,752 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-13 10:35:30,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:35:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-13 10:35:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:35:30,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:30,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:30,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:35:30,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times [2020-10-13 10:35:30,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:30,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313228279] [2020-10-13 10:35:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:30,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:30,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:35:30,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:35:30,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-13 10:35:30,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:30,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:35:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:35:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:35:30,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:31,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:31,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:31,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:31,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:31,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:31,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:31,047 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 10:35:31,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313228279] [2020-10-13 10:35:31,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:31,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:35:31,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139495509] [2020-10-13 10:35:31,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:35:31,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:35:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:35:31,051 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2020-10-13 10:35:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:31,158 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-10-13 10:35:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:35:31,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 10:35:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:31,160 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:35:31,161 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:35:31,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:35:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:35:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:35:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:35:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-13 10:35:31,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-10-13 10:35:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:31,169 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-13 10:35:31,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:35:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-13 10:35:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:35:31,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:31,171 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:31,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:35:31,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times [2020-10-13 10:35:31,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:31,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160098454] [2020-10-13 10:35:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:31,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:31,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:35:31,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:31,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 10:35:31,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:35:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:35:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:35:31,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:31,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:31,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:31,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:31,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:31,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:35:31,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:31,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:31,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:31,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:31,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:35:31,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160098454] [2020-10-13 10:35:31,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:31,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:35:31,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159738192] [2020-10-13 10:35:31,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:35:31,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:31,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:35:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:35:31,302 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 5 states. [2020-10-13 10:35:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:31,414 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-10-13 10:35:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:35:31,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 10:35:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:31,417 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:35:31,417 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:35:31,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:35:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:35:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-13 10:35:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:35:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-13 10:35:31,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 21 [2020-10-13 10:35:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:31,426 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-13 10:35:31,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:35:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-13 10:35:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:35:31,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:31,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:31,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:35:31,428 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-10-13 10:35:31,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:31,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268210489] [2020-10-13 10:35:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:31,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:31,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:35:31,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:31,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-13 10:35:31,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:35:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:35:31,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:35:31,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:31,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:31,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:31,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:31,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:31,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:35:31,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:31,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:31,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:31,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:31,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:31,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268210489] [2020-10-13 10:35:31,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:31,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:35:31,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200646684] [2020-10-13 10:35:31,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:35:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:35:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:35:31,904 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 11 states. [2020-10-13 10:35:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:32,181 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2020-10-13 10:35:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:35:32,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-13 10:35:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:32,185 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:35:32,185 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:35:32,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:35:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:35:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2020-10-13 10:35:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:35:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-13 10:35:32,195 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 27 [2020-10-13 10:35:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:32,196 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-13 10:35:32,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:35:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-13 10:35:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:35:32,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:32,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:32,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:35:32,198 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1031451170, now seen corresponding path program 1 times [2020-10-13 10:35:32,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:32,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409451273] [2020-10-13 10:35:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:32,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:32,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:35:32,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:32,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 10:35:32,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:35:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:35:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:35:32,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:32,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:32,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:32,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:32,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:32,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:32,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:35:32,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409451273] [2020-10-13 10:35:32,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:32,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:35:32,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834368934] [2020-10-13 10:35:32,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:35:32,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:32,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:35:32,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:32,402 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 4 states. [2020-10-13 10:35:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:32,484 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2020-10-13 10:35:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:35:32,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 10:35:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:32,486 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:35:32,486 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:35:32,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:35:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-10-13 10:35:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:35:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-13 10:35:32,495 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 27 [2020-10-13 10:35:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:32,496 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-13 10:35:32,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:35:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-13 10:35:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:35:32,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:32,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:32,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:35:32,498 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:32,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1594603947, now seen corresponding path program 1 times [2020-10-13 10:35:32,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:32,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705830569] [2020-10-13 10:35:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:32,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:32,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:35:32,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:35:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-13 10:35:32,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:35:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:35:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:35:32,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:32,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:32,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:32,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:32,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:32,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:35:32,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:32,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:32,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:32,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:35:32,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705830569] [2020-10-13 10:35:32,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:32,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:35:32,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515584085] [2020-10-13 10:35:32,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:35:32,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:35:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:35:32,942 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 5 states. [2020-10-13 10:35:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:33,057 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-10-13 10:35:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:35:33,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-13 10:35:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:33,059 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:35:33,059 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:35:33,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:35:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:35:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-13 10:35:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:35:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-13 10:35:33,077 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2020-10-13 10:35:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:33,077 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-13 10:35:33,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:35:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-13 10:35:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:35:33,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:33,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:33,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:35:33,086 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1592893925, now seen corresponding path program 1 times [2020-10-13 10:35:33,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:33,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653267742] [2020-10-13 10:35:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:33,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:33,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:33,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:35:33,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:33,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 10:35:33,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:35:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:35:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:35:33,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:33,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:33,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:33,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:33,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:33,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:33,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:33,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:33,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:35:33,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653267742] [2020-10-13 10:35:33,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:33,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:35:33,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226504996] [2020-10-13 10:35:33,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:35:33,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:35:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:35:33,401 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 7 states. [2020-10-13 10:35:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:33,580 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-13 10:35:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:35:33,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-13 10:35:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:33,582 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:35:33,582 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:35:33,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:35:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:35:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-13 10:35:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:35:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-13 10:35:33,591 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 29 [2020-10-13 10:35:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:33,591 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-13 10:35:33,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:35:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-13 10:35:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:35:33,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:33,593 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:33,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:35:33,593 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:33,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1278392056, now seen corresponding path program 2 times [2020-10-13 10:35:33,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:33,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898105727] [2020-10-13 10:35:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:33,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:33,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:33,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:33,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:35:33,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:33,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-13 10:35:33,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:35:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:35:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:35:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:34,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:34,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:34,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:34,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:34,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:34,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:34,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:34,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:35:34,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898105727] [2020-10-13 10:35:34,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:35:34,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:35:34,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775448937] [2020-10-13 10:35:34,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:35:34,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:35:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:34,042 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 4 states. [2020-10-13 10:35:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:34,114 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2020-10-13 10:35:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:35:34,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-13 10:35:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:34,116 INFO L225 Difference]: With dead ends: 112 [2020-10-13 10:35:34,116 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:35:34,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:35:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:35:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2020-10-13 10:35:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:35:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-13 10:35:34,124 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 30 [2020-10-13 10:35:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:34,124 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-13 10:35:34,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:35:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-13 10:35:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:35:34,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:34,125 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:34,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:35:34,126 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash 496615306, now seen corresponding path program 1 times [2020-10-13 10:35:34,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:34,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897429042] [2020-10-13 10:35:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:34,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:34,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:34,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:34,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:35:34,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:34,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-13 10:35:34,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:34,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:35:34,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:35:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:34,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:34,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:34,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:34,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:34,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:34,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:34,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:34,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:34,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:34,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:34,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897429042] [2020-10-13 10:35:34,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:34,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:35:34,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407417669] [2020-10-13 10:35:34,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:35:34,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:35:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:35:34,999 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 12 states. [2020-10-13 10:35:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:35,653 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-13 10:35:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:35:35,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-13 10:35:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:35,654 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:35:35,655 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:35:35,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:35:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:35:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-10-13 10:35:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:35:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-13 10:35:35,662 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 30 [2020-10-13 10:35:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:35,662 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-13 10:35:35,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:35:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-13 10:35:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:35:35,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:35,663 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:35,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:35:35,664 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash 748997879, now seen corresponding path program 1 times [2020-10-13 10:35:35,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:35,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363276591] [2020-10-13 10:35:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:35,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:36,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:36,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:35:36,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:36,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-13 10:35:36,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:36,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:35:36,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:36,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:35:36,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:37,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:37,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:37,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:37,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:37,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:37,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:37,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:37,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363276591] [2020-10-13 10:35:37,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:37,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:35:37,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297387198] [2020-10-13 10:35:37,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:35:37,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:37,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:35:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:35:37,058 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 15 states. [2020-10-13 10:35:37,593 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-13 10:35:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:38,287 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-13 10:35:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:35:38,287 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-13 10:35:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:38,288 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:35:38,288 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:35:38,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:35:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:35:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-10-13 10:35:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:35:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 10:35:38,296 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 33 [2020-10-13 10:35:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:38,296 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 10:35:38,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:35:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 10:35:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:35:38,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:38,297 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:38,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:35:38,298 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash -621471021, now seen corresponding path program 1 times [2020-10-13 10:35:38,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:38,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078287718] [2020-10-13 10:35:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:38,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:38,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:38,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:35:38,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:38,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-13 10:35:38,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:35:38,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:38,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:35:38,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:39,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:39,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:39,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:39,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:39,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:35:39,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:39,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:39,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:39,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:39,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078287718] [2020-10-13 10:35:39,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:39,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:35:39,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082661727] [2020-10-13 10:35:39,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:35:39,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:39,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:35:39,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:35:39,442 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 18 states. [2020-10-13 10:35:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:40,393 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-13 10:35:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:35:40,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-13 10:35:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:40,395 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:35:40,395 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:35:40,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:35:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:35:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-10-13 10:35:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:35:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-13 10:35:40,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 36 [2020-10-13 10:35:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:40,410 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-13 10:35:40,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:35:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-13 10:35:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:35:40,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:40,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:40,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:35:40,412 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash -234871608, now seen corresponding path program 1 times [2020-10-13 10:35:40,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:40,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805724452] [2020-10-13 10:35:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:40,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:40,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:41,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:41,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:41,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:35:41,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:35:41,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-13 10:35:41,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:41,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:35:41,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:35:41,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:35:41,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:41,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:41,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:41,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:41,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:41,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:41,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:41,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:41,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:41,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:35:41,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805724452] [2020-10-13 10:35:41,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:41,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:35:41,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132843796] [2020-10-13 10:35:41,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:35:41,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:41,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:35:41,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:35:41,697 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 7 states. [2020-10-13 10:35:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:41,963 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-13 10:35:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:35:41,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-13 10:35:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:41,965 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:35:41,965 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:35:41,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:35:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:35:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-10-13 10:35:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:35:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-13 10:35:41,972 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 38 [2020-10-13 10:35:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:41,972 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-13 10:35:41,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:35:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-13 10:35:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:35:41,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:41,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:41,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:35:41,974 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash -233161586, now seen corresponding path program 1 times [2020-10-13 10:35:41,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:41,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668891019] [2020-10-13 10:35:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:42,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:42,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:35:42,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:42,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-13 10:35:42,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:35:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:35:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:35:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:42,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:42,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:42,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:42,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:42,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:42,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:42,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:35:42,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668891019] [2020-10-13 10:35:42,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:42,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:35:42,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236411363] [2020-10-13 10:35:42,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:35:42,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:35:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:35:42,262 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 8 states. [2020-10-13 10:35:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:42,408 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-13 10:35:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:35:42,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-13 10:35:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:42,410 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:35:42,410 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:35:42,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:35:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:35:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-13 10:35:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:35:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-13 10:35:42,423 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 38 [2020-10-13 10:35:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:42,423 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-13 10:35:42,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:35:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-13 10:35:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:35:42,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:42,424 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:42,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:35:42,425 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:42,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2076362507, now seen corresponding path program 2 times [2020-10-13 10:35:42,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:42,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850418239] [2020-10-13 10:35:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:42,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:42,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:35:42,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-13 10:35:42,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:35:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:35:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:43,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:43,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:43,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:43,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:43,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:43,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:43,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:43,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:43,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:43,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:43,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:43,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850418239] [2020-10-13 10:35:43,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:43,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:35:43,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581141059] [2020-10-13 10:35:43,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:35:43,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:43,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:35:43,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:35:43,436 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 16 states. [2020-10-13 10:35:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:44,342 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2020-10-13 10:35:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:35:44,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 10:35:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:44,343 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:35:44,343 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:35:44,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:35:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:35:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-13 10:35:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:35:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-13 10:35:44,353 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 39 [2020-10-13 10:35:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:44,353 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-13 10:35:44,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:35:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-13 10:35:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:35:44,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:44,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:44,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:35:44,354 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash -731659325, now seen corresponding path program 1 times [2020-10-13 10:35:44,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:44,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286976871] [2020-10-13 10:35:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:44,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:44,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:44,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:35:44,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:44,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-13 10:35:44,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:44,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:35:44,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:44,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:35:44,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:45,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:45,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:45,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:45,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:45,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:45,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:45,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:45,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:45,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:45,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:45,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:35:45,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286976871] [2020-10-13 10:35:45,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:45,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:35:45,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647840831] [2020-10-13 10:35:45,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:35:45,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:45,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:35:45,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:35:45,261 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 18 states. [2020-10-13 10:35:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:46,143 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-13 10:35:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:35:46,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-13 10:35:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:46,145 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:35:46,145 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:35:46,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:35:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:35:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-13 10:35:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:35:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-13 10:35:46,157 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 40 [2020-10-13 10:35:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:46,157 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-13 10:35:46,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:35:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-13 10:35:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:35:46,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:46,158 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:46,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:35:46,158 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1250078526, now seen corresponding path program 1 times [2020-10-13 10:35:46,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:46,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745668362] [2020-10-13 10:35:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:46,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:46,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:46,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:35:46,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:46,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 10:35:46,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:35:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:35:46,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:35:46,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:46,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:46,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:46,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:46,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:46,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:46,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 10:35:46,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745668362] [2020-10-13 10:35:46,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:46,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:35:46,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643072666] [2020-10-13 10:35:46,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:35:46,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:35:46,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:35:46,417 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 7 states. [2020-10-13 10:35:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:46,552 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-13 10:35:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:35:46,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-13 10:35:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:46,553 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:35:46,553 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:35:46,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:35:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:35:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-13 10:35:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:35:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-13 10:35:46,561 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 42 [2020-10-13 10:35:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:46,561 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-13 10:35:46,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:35:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-13 10:35:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:35:46,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:46,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:46,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:35:46,563 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -855225014, now seen corresponding path program 3 times [2020-10-13 10:35:46,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:46,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634780026] [2020-10-13 10:35:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:46,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:47,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:47,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:35:47,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:47,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-13 10:35:47,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:47,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:35:47,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:47,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:35:47,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:47,784 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-13 10:35:48,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:48,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:48,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:48,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634780026] [2020-10-13 10:35:48,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:48,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:35:48,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669658682] [2020-10-13 10:35:48,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:35:48,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:35:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:35:48,458 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 22 states. [2020-10-13 10:35:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:50,182 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-10-13 10:35:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:35:50,182 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-13 10:35:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:50,184 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:35:50,184 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:35:50,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:35:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:35:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-10-13 10:35:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:35:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-13 10:35:50,193 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 45 [2020-10-13 10:35:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:50,193 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-13 10:35:50,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:35:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-13 10:35:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:35:50,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:50,194 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:50,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:35:50,194 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1531102706, now seen corresponding path program 2 times [2020-10-13 10:35:50,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:50,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549258199] [2020-10-13 10:35:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:50,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:50,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:52,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:52,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:35:52,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:35:52,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2068 [2020-10-13 10:35:52,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:52,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:35:52,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:52,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:35:52,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:53,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:35:53,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549258199] [2020-10-13 10:35:53,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:53,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:35:53,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396679733] [2020-10-13 10:35:53,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:35:53,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:35:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:35:53,104 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 19 states. [2020-10-13 10:35:53,682 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-13 10:35:53,835 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-13 10:35:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:54,727 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-10-13 10:35:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:35:54,728 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-13 10:35:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:54,729 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:35:54,729 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:35:54,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:35:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:35:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-10-13 10:35:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:35:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-13 10:35:54,745 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 46 [2020-10-13 10:35:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:54,746 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-13 10:35:54,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:35:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-13 10:35:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:35:54,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:54,747 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:54,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:35:54,747 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:54,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1534159489, now seen corresponding path program 2 times [2020-10-13 10:35:54,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:54,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399517521] [2020-10-13 10:35:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:54,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:57,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:57,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:35:57,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:35:57,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2624 [2020-10-13 10:35:57,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:35:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:35:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:35:57,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:35:57,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:35:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:57,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:35:57,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:35:57,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:35:57,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:35:57,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:35:57,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:35:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:35:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:35:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:35:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:35:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:35:57,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399517521] [2020-10-13 10:35:57,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:35:57,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:35:57,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846862654] [2020-10-13 10:35:57,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:35:57,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:35:57,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:35:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:35:57,823 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 18 states. [2020-10-13 10:35:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:35:58,802 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2020-10-13 10:35:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:35:58,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-13 10:35:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:35:58,804 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:35:58,804 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:35:58,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:35:58,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:35:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2020-10-13 10:35:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:35:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-10-13 10:35:58,818 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 47 [2020-10-13 10:35:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:35:58,818 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-10-13 10:35:58,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:35:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-10-13 10:35:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:35:58,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:35:58,820 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:35:58,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:35:58,820 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:35:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:35:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1532449467, now seen corresponding path program 2 times [2020-10-13 10:35:58,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:35:58,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055546870] [2020-10-13 10:35:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:35:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:35:58,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:00,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:00,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:36:00,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:00,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-13 10:36:00,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:00,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:36:00,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:00,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:36:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:01,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:01,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:01,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:01,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:01,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:01,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:01,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:01,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:01,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055546870] [2020-10-13 10:36:01,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:01,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:36:01,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851366737] [2020-10-13 10:36:01,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:36:01,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:36:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:36:01,149 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 23 states. [2020-10-13 10:36:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:02,216 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2020-10-13 10:36:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:36:02,217 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-13 10:36:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:02,218 INFO L225 Difference]: With dead ends: 116 [2020-10-13 10:36:02,218 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 10:36:02,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:36:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 10:36:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-10-13 10:36:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:36:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-13 10:36:02,229 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2020-10-13 10:36:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:02,229 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-13 10:36:02,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:36:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-13 10:36:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:36:02,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:02,230 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:02,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:36:02,230 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1924573792, now seen corresponding path program 4 times [2020-10-13 10:36:02,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:02,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805210164] [2020-10-13 10:36:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:02,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:03,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:03,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:03,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:36:03,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:03,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-13 10:36:03,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:36:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:03,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:36:03,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:03,765 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-13 10:36:04,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:04,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:04,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:04,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:04,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:04,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:04,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:04,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:04,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805210164] [2020-10-13 10:36:04,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:04,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:36:04,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80316198] [2020-10-13 10:36:04,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:36:04,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:36:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:36:04,673 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 22 states. [2020-10-13 10:36:05,505 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 10:36:05,825 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-13 10:36:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:06,297 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-10-13 10:36:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:36:06,299 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-13 10:36:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:06,299 INFO L225 Difference]: With dead ends: 120 [2020-10-13 10:36:06,300 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 10:36:06,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:36:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 10:36:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-13 10:36:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:36:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-13 10:36:06,316 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 48 [2020-10-13 10:36:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:06,316 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-13 10:36:06,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:36:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-13 10:36:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:36:06,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:06,318 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:06,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:36:06,319 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:06,319 INFO L82 PathProgramCache]: Analyzing trace with hash 488170170, now seen corresponding path program 3 times [2020-10-13 10:36:06,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:06,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034291409] [2020-10-13 10:36:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:06,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:06,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:08,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:09,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:09,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:36:09,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:36:09,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2891 [2020-10-13 10:36:09,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:09,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:36:09,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:36:09,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:36:09,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:09,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:09,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:09,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:09,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:09,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:09,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:09,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:09,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:09,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 10:36:09,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034291409] [2020-10-13 10:36:09,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:09,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:36:09,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605346193] [2020-10-13 10:36:09,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:36:09,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:09,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:36:09,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:36:09,342 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 9 states. [2020-10-13 10:36:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:09,752 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2020-10-13 10:36:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:36:09,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-13 10:36:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:09,755 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:36:09,755 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 10:36:09,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:36:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 10:36:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2020-10-13 10:36:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:36:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2020-10-13 10:36:09,773 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 49 [2020-10-13 10:36:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:09,773 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2020-10-13 10:36:09,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:36:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2020-10-13 10:36:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:36:09,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:09,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:09,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:36:09,778 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash 489880192, now seen corresponding path program 3 times [2020-10-13 10:36:09,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:09,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273761333] [2020-10-13 10:36:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:09,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:11,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:12,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:12,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:36:12,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:36:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2596 [2020-10-13 10:36:12,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:36:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 10:36:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:36:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:12,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:12,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:12,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:12,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:12,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:12,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:12,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:12,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 10:36:12,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273761333] [2020-10-13 10:36:12,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:12,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:36:12,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329719989] [2020-10-13 10:36:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:36:12,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:12,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:36:12,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:36:12,703 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 12 states. [2020-10-13 10:36:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:13,294 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-10-13 10:36:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:36:13,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 10:36:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:13,296 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:36:13,296 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:36:13,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:36:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:36:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2020-10-13 10:36:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 10:36:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2020-10-13 10:36:13,309 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 49 [2020-10-13 10:36:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:13,309 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2020-10-13 10:36:13,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:36:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2020-10-13 10:36:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:36:13,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:13,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:13,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:36:13,310 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1673212619, now seen corresponding path program 4 times [2020-10-13 10:36:13,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:13,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621947006] [2020-10-13 10:36:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:13,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:14,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:14,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:36:14,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:14,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-10-13 10:36:14,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:14,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:36:14,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:14,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:36:14,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:15,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:15,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:15,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:36:15,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621947006] [2020-10-13 10:36:15,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:15,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:36:15,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580232612] [2020-10-13 10:36:15,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:36:15,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:36:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:36:15,154 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand 23 states. [2020-10-13 10:36:16,251 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2020-10-13 10:36:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:17,271 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-13 10:36:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:36:17,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 10:36:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:17,273 INFO L225 Difference]: With dead ends: 122 [2020-10-13 10:36:17,273 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:36:17,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:36:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:36:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2020-10-13 10:36:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:36:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2020-10-13 10:36:17,287 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 51 [2020-10-13 10:36:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:17,287 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2020-10-13 10:36:17,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:36:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2020-10-13 10:36:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:36:17,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:17,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:17,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:36:17,289 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1671502597, now seen corresponding path program 4 times [2020-10-13 10:36:17,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:17,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216221269] [2020-10-13 10:36:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:17,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:17,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:19,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:19,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:36:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1876 [2020-10-13 10:36:19,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:36:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 10:36:19,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:36:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:19,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:19,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:19,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:19,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:19,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:19,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:36:19,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:19,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:19,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:19,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:19,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:36:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 10:36:19,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216221269] [2020-10-13 10:36:19,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:19,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:36:19,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100191806] [2020-10-13 10:36:19,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:36:19,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:19,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:36:19,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:36:19,576 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 13 states. [2020-10-13 10:36:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:20,476 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-10-13 10:36:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:36:20,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 10:36:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:20,478 INFO L225 Difference]: With dead ends: 128 [2020-10-13 10:36:20,478 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 10:36:20,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:36:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 10:36:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2020-10-13 10:36:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:36:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-10-13 10:36:20,492 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 51 [2020-10-13 10:36:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:20,492 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-10-13 10:36:20,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:36:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-10-13 10:36:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:36:20,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:20,493 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:20,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:36:20,493 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1132117919, now seen corresponding path program 5 times [2020-10-13 10:36:20,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:20,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619349963] [2020-10-13 10:36:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:21,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:22,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:22,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:36:22,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:22,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1493 [2020-10-13 10:36:22,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:36:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:36:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:22,500 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-13 10:36:22,770 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-13 10:36:23,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:23,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:23,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:23,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:23,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:23,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:36:23,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:23,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:23,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:23,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:23,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:23,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619349963] [2020-10-13 10:36:23,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:23,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:36:23,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348147948] [2020-10-13 10:36:23,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:36:23,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:36:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:36:23,815 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 23 states. [2020-10-13 10:36:24,041 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-13 10:36:24,537 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-13 10:36:24,701 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2020-10-13 10:36:25,032 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-13 10:36:25,719 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2020-10-13 10:36:25,890 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-13 10:36:26,357 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-13 10:36:26,877 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-13 10:36:27,065 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-13 10:36:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:27,238 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2020-10-13 10:36:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:36:27,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 10:36:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:27,240 INFO L225 Difference]: With dead ends: 145 [2020-10-13 10:36:27,240 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 10:36:27,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:36:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 10:36:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2020-10-13 10:36:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:36:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2020-10-13 10:36:27,258 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 51 [2020-10-13 10:36:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:27,259 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2020-10-13 10:36:27,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:36:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2020-10-13 10:36:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:36:27,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:27,260 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:27,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:36:27,260 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1524848169, now seen corresponding path program 5 times [2020-10-13 10:36:27,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:27,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390097916] [2020-10-13 10:36:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:27,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:29,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:29,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:36:29,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:29,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1840 [2020-10-13 10:36:29,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:36:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:36:29,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:30,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:30,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:30,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:30,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:30,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:30,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:30,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:30,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:36:30,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390097916] [2020-10-13 10:36:30,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:30,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:36:30,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258683183] [2020-10-13 10:36:30,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:36:30,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:30,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:36:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:36:30,118 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 21 states. [2020-10-13 10:36:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:31,699 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2020-10-13 10:36:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:36:31,700 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-13 10:36:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:31,701 INFO L225 Difference]: With dead ends: 141 [2020-10-13 10:36:31,701 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 10:36:31,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:36:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 10:36:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-10-13 10:36:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:36:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2020-10-13 10:36:31,728 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 52 [2020-10-13 10:36:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:31,728 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2020-10-13 10:36:31,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:36:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2020-10-13 10:36:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:36:31,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:31,729 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:31,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:36:31,729 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1639504848, now seen corresponding path program 2 times [2020-10-13 10:36:31,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:31,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690269604] [2020-10-13 10:36:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:34,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2868 [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:36:34,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:34,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:34,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:34,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:34,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:34,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:34,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:34,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 10:36:34,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690269604] [2020-10-13 10:36:34,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:34,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:36:34,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550345683] [2020-10-13 10:36:34,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:36:34,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:34,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:36:34,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:36:34,869 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand 12 states. [2020-10-13 10:36:35,500 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-13 10:36:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:35,661 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-13 10:36:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:36:35,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-13 10:36:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:35,662 INFO L225 Difference]: With dead ends: 147 [2020-10-13 10:36:35,662 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:36:35,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:36:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:36:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-13 10:36:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:36:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2020-10-13 10:36:35,676 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 53 [2020-10-13 10:36:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:35,676 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2020-10-13 10:36:35,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:36:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2020-10-13 10:36:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:36:35,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:35,677 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:35,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:36:35,678 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash -208931031, now seen corresponding path program 6 times [2020-10-13 10:36:35,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:35,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444944196] [2020-10-13 10:36:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:35,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:36,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:36,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:36:36,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-13 10:36:36,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:36:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:36:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:38,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:38,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:38,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:38,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:38,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:38,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:38,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444944196] [2020-10-13 10:36:38,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:38,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:36:38,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077920392] [2020-10-13 10:36:38,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:36:38,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:38,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:36:38,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:36:38,160 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand 26 states. [2020-10-13 10:36:38,733 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-13 10:36:38,892 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-13 10:36:39,253 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-13 10:36:39,515 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-10-13 10:36:39,861 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-13 10:36:40,552 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-13 10:36:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:41,221 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2020-10-13 10:36:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:36:41,221 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-13 10:36:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:41,222 INFO L225 Difference]: With dead ends: 126 [2020-10-13 10:36:41,223 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 10:36:41,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=253, Invalid=2099, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:36:41,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 10:36:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2020-10-13 10:36:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:36:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2020-10-13 10:36:41,235 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 54 [2020-10-13 10:36:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:41,236 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2020-10-13 10:36:41,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:36:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2020-10-13 10:36:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:36:41,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:41,237 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:41,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:36:41,237 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1080777572, now seen corresponding path program 5 times [2020-10-13 10:36:41,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:41,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456562647] [2020-10-13 10:36:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:41,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:42,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:42,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:36:42,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:42,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1598 [2020-10-13 10:36:42,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:36:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:36:42,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:43,524 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-13 10:36:43,689 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-13 10:36:44,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:44,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:44,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:44,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:44,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456562647] [2020-10-13 10:36:44,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:44,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:36:44,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754915958] [2020-10-13 10:36:44,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:36:44,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:44,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:36:44,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:36:44,699 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand 27 states. [2020-10-13 10:36:45,367 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-13 10:36:45,763 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-13 10:36:45,933 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-13 10:36:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:46,850 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-10-13 10:36:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:36:46,851 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-10-13 10:36:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:46,852 INFO L225 Difference]: With dead ends: 128 [2020-10-13 10:36:46,852 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 10:36:46,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:36:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 10:36:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2020-10-13 10:36:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 10:36:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2020-10-13 10:36:46,865 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 56 [2020-10-13 10:36:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:46,865 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2020-10-13 10:36:46,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:36:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2020-10-13 10:36:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:36:46,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:46,866 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:46,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:36:46,867 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1045727, now seen corresponding path program 7 times [2020-10-13 10:36:46,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:46,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7913624] [2020-10-13 10:36:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:46,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:48,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:48,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:36:48,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:48,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-13 10:36:48,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:36:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:48,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:36:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:48,910 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-13 10:36:49,068 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-13 10:36:49,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:49,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:49,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:49,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:49,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:49,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:36:49,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:49,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:49,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:49,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:49,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:49,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7913624] [2020-10-13 10:36:49,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:49,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:36:49,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128002030] [2020-10-13 10:36:49,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:36:49,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:36:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:36:49,531 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand 24 states. [2020-10-13 10:36:49,806 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-13 10:36:50,311 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2020-10-13 10:36:50,523 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-10-13 10:36:51,278 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2020-10-13 10:36:51,457 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-13 10:36:52,022 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-13 10:36:52,217 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 10:36:52,606 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-13 10:36:52,794 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-13 10:36:52,966 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 10:36:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:36:53,421 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2020-10-13 10:36:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:36:53,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-13 10:36:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:36:53,423 INFO L225 Difference]: With dead ends: 132 [2020-10-13 10:36:53,423 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:36:53,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:36:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:36:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-10-13 10:36:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 10:36:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2020-10-13 10:36:53,435 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 57 [2020-10-13 10:36:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:36:53,436 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2020-10-13 10:36:53,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:36:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2020-10-13 10:36:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:36:53,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:36:53,437 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:36:53,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:36:53,437 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:36:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:36:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1275990966, now seen corresponding path program 8 times [2020-10-13 10:36:53,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:36:53,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693188889] [2020-10-13 10:36:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:36:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:54,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:54,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:54,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:36:54,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:36:54,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1459 [2020-10-13 10:36:54,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:54,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:36:54,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:36:54,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:36:54,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:55,632 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-13 10:36:56,113 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-13 10:36:56,246 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-13 10:36:56,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:36:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:36:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:36:56,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:36:56,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:36:56,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:36:56,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:36:56,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:36:56,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:36:56,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:36:56,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:36:56,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:36:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:36:56,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693188889] [2020-10-13 10:36:56,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:36:56,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:36:56,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366269243] [2020-10-13 10:36:56,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:36:56,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:36:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:36:56,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:36:56,604 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand 25 states. [2020-10-13 10:36:56,821 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-13 10:36:57,322 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-13 10:36:57,501 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-13 10:36:57,771 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2020-10-13 10:36:58,128 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 115 [2020-10-13 10:36:58,514 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 106 [2020-10-13 10:36:58,698 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-13 10:36:58,867 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-13 10:36:59,218 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-13 10:36:59,660 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-13 10:37:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:00,021 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2020-10-13 10:37:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:37:00,022 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-13 10:37:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:00,023 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:37:00,024 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 10:37:00,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:37:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 10:37:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 10:37:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:37:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2020-10-13 10:37:00,038 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 57 [2020-10-13 10:37:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:00,038 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2020-10-13 10:37:00,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:37:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2020-10-13 10:37:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:37:00,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:00,039 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:00,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:37:00,039 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash -756513511, now seen corresponding path program 6 times [2020-10-13 10:37:00,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:00,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516727168] [2020-10-13 10:37:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:00,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:03,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:03,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:37:03,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:37:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3520 [2020-10-13 10:37:03,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:37:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:37:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:04,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:04,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:04,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:04,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:04,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:04,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:37:04,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516727168] [2020-10-13 10:37:04,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:04,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:37:04,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222780791] [2020-10-13 10:37:04,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:37:04,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:37:04,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:37:04,097 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 22 states. [2020-10-13 10:37:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:05,317 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-10-13 10:37:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:37:05,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-13 10:37:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:05,319 INFO L225 Difference]: With dead ends: 128 [2020-10-13 10:37:05,319 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 10:37:05,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:37:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 10:37:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2020-10-13 10:37:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:37:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-10-13 10:37:05,332 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 58 [2020-10-13 10:37:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:05,332 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-10-13 10:37:05,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:37:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-10-13 10:37:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:37:05,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:05,333 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:05,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:37:05,334 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:05,334 INFO L82 PathProgramCache]: Analyzing trace with hash -754803489, now seen corresponding path program 6 times [2020-10-13 10:37:05,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:05,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908042185] [2020-10-13 10:37:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:05,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:07,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:07,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:37:07,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:07,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-13 10:37:07,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:07,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:37:07,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:07,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:37:07,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:08,320 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-13 10:37:09,109 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-13 10:37:09,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:09,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:09,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:09,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:09,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:09,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:09,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:09,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:09,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:09,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:09,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908042185] [2020-10-13 10:37:09,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:09,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:37:09,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742943025] [2020-10-13 10:37:09,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:37:09,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:37:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:37:09,424 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 26 states. [2020-10-13 10:37:09,719 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-13 10:37:10,236 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-13 10:37:10,492 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-13 10:37:10,671 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 10:37:11,215 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:37:11,669 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2020-10-13 10:37:11,894 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-13 10:37:12,296 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2020-10-13 10:37:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:13,073 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-10-13 10:37:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:37:13,073 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-13 10:37:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:13,074 INFO L225 Difference]: With dead ends: 126 [2020-10-13 10:37:13,075 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:37:13,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:37:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:37:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2020-10-13 10:37:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:37:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-13 10:37:13,091 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 58 [2020-10-13 10:37:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:13,091 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-13 10:37:13,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:37:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-13 10:37:13,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:37:13,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:13,092 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:13,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:37:13,092 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash 112083234, now seen corresponding path program 7 times [2020-10-13 10:37:13,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:13,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635209078] [2020-10-13 10:37:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:14,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:14,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:37:14,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:37:14,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1731 [2020-10-13 10:37:14,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:14,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:37:14,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:14,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:37:14,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:16,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:16,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:16,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:37:16,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635209078] [2020-10-13 10:37:16,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:16,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:37:16,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384271319] [2020-10-13 10:37:16,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:37:16,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:16,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:37:16,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:37:16,306 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 24 states. [2020-10-13 10:37:17,264 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-13 10:37:17,469 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 60 [2020-10-13 10:37:17,776 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 65 [2020-10-13 10:37:18,201 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 64 [2020-10-13 10:37:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:18,701 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2020-10-13 10:37:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:37:18,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-13 10:37:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:18,704 INFO L225 Difference]: With dead ends: 114 [2020-10-13 10:37:18,704 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 10:37:18,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:37:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 10:37:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-13 10:37:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 10:37:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-13 10:37:18,720 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 58 [2020-10-13 10:37:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:18,721 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-13 10:37:18,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:37:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-13 10:37:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:37:18,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:18,722 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:18,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:37:18,722 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:18,723 INFO L82 PathProgramCache]: Analyzing trace with hash 481645524, now seen corresponding path program 8 times [2020-10-13 10:37:18,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:18,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15120430] [2020-10-13 10:37:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:18,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:20,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:20,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:37:20,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:20,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-13 10:37:20,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:37:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:37:20,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:21,250 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-13 10:37:21,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:21,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:21,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:21,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:21,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:21,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:21,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:21,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:21,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:21,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:21,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:37:21,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15120430] [2020-10-13 10:37:21,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:21,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:37:21,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346522649] [2020-10-13 10:37:21,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:37:21,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:21,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:37:21,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:37:21,827 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 25 states. [2020-10-13 10:37:22,549 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-13 10:37:22,754 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-10-13 10:37:23,090 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-13 10:37:23,430 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-13 10:37:23,899 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-13 10:37:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:24,773 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-10-13 10:37:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:37:24,774 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-13 10:37:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:24,775 INFO L225 Difference]: With dead ends: 116 [2020-10-13 10:37:24,775 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 10:37:24,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:37:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 10:37:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2020-10-13 10:37:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:37:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2020-10-13 10:37:24,791 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 60 [2020-10-13 10:37:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:24,792 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2020-10-13 10:37:24,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:37:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2020-10-13 10:37:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:37:24,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:24,793 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:24,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:37:24,793 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 924116916, now seen corresponding path program 9 times [2020-10-13 10:37:24,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:24,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604417027] [2020-10-13 10:37:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:27,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:27,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:37:27,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:37:27,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-13 10:37:27,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:27,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:37:27,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:27,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:37:27,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:27,864 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-13 10:37:28,139 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 10:37:28,532 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 10:37:28,663 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-13 10:37:29,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:29,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:29,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:29,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:29,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:29,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:29,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:29,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:29,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:29,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:29,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:29,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604417027] [2020-10-13 10:37:29,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:29,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:37:29,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928118943] [2020-10-13 10:37:29,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:37:29,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:37:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:37:29,640 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand 27 states. [2020-10-13 10:37:30,296 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-13 10:37:30,466 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-13 10:37:30,700 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-13 10:37:31,088 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-13 10:37:31,388 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 100 [2020-10-13 10:37:32,482 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-13 10:37:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:33,599 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2020-10-13 10:37:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:37:33,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-13 10:37:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:33,600 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:37:33,600 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 10:37:33,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:37:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 10:37:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-10-13 10:37:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:37:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2020-10-13 10:37:33,621 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 60 [2020-10-13 10:37:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:33,621 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2020-10-13 10:37:33,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:37:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2020-10-13 10:37:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:37:33,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:33,622 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:33,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:37:33,623 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash -995066097, now seen corresponding path program 3 times [2020-10-13 10:37:33,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:33,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738266611] [2020-10-13 10:37:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:35,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:37:35,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:36,168 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-13 10:37:36,403 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-13 10:37:36,713 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 10:37:36,857 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-13 10:37:37,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:37,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:37,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:37,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:37,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:37,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:37:37,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:37,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:37:37,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738266611] [2020-10-13 10:37:37,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:37,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:37:37,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386754636] [2020-10-13 10:37:37,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:37:37,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:37:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:37:37,863 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 27 states. [2020-10-13 10:37:38,591 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 10:37:38,898 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-13 10:37:39,593 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-13 10:37:39,987 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-13 10:37:40,447 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-10-13 10:37:40,614 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2020-10-13 10:37:40,993 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-13 10:37:41,223 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-13 10:37:41,479 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-13 10:37:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:42,888 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-13 10:37:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:37:42,889 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-13 10:37:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:42,890 INFO L225 Difference]: With dead ends: 136 [2020-10-13 10:37:42,890 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:37:42,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:37:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:37:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2020-10-13 10:37:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:37:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2020-10-13 10:37:42,911 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 62 [2020-10-13 10:37:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:42,911 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2020-10-13 10:37:42,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:37:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2020-10-13 10:37:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:37:42,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:42,912 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:42,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:37:42,913 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash 484455540, now seen corresponding path program 10 times [2020-10-13 10:37:42,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:42,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314618596] [2020-10-13 10:37:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:44,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:44,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:37:44,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-13 10:37:44,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:37:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:37:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:37:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:45,220 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-13 10:37:45,458 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 10:37:45,749 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-13 10:37:45,982 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-13 10:37:46,162 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-13 10:37:46,366 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-13 10:37:46,547 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-13 10:37:46,832 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-13 10:37:47,061 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-13 10:37:47,237 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-13 10:37:47,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:47,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:47,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:47,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:47,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:47,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:47,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:47,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:47,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:37:47,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314618596] [2020-10-13 10:37:47,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:47,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:37:47,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297875259] [2020-10-13 10:37:47,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:37:47,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:47,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:37:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:37:47,871 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 30 states. [2020-10-13 10:37:48,861 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 54 [2020-10-13 10:37:49,073 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 45 [2020-10-13 10:37:49,254 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 10:37:49,482 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-13 10:37:49,936 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 65 [2020-10-13 10:37:50,346 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 82 [2020-10-13 10:37:50,805 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 73 [2020-10-13 10:37:51,444 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-13 10:37:51,932 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 56 [2020-10-13 10:37:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:37:53,718 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2020-10-13 10:37:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:37:53,719 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2020-10-13 10:37:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:37:53,721 INFO L225 Difference]: With dead ends: 160 [2020-10-13 10:37:53,721 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 10:37:53,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=343, Invalid=2963, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:37:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 10:37:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2020-10-13 10:37:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 10:37:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2020-10-13 10:37:53,745 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 63 [2020-10-13 10:37:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:37:53,746 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2020-10-13 10:37:53,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:37:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2020-10-13 10:37:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:37:53,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:37:53,747 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:37:53,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:37:53,747 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:37:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:37:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1519241098, now seen corresponding path program 4 times [2020-10-13 10:37:53,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:37:53,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036426082] [2020-10-13 10:37:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:37:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:53,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:56,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:58,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:58,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:37:58,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:37:58,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-13 10:37:58,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:58,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:37:58,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 10:37:58,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:37:58,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:59,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:37:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:37:59,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:37:59,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:37:59,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:37:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 10:37:59,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036426082] [2020-10-13 10:37:59,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:37:59,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:37:59,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739958601] [2020-10-13 10:37:59,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:37:59,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:37:59,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:37:59,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:37:59,374 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand 15 states. [2020-10-13 10:38:00,267 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 10:38:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:00,446 INFO L93 Difference]: Finished difference Result 157 states and 170 transitions. [2020-10-13 10:38:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:38:00,447 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-13 10:38:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:00,449 INFO L225 Difference]: With dead ends: 157 [2020-10-13 10:38:00,449 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 10:38:00,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:38:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 10:38:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2020-10-13 10:38:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 10:38:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2020-10-13 10:38:00,467 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 64 [2020-10-13 10:38:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:00,468 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2020-10-13 10:38:00,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:38:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2020-10-13 10:38:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:38:00,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:00,469 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:00,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:38:00,469 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:00,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1703631401, now seen corresponding path program 3 times [2020-10-13 10:38:00,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:00,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337572021] [2020-10-13 10:38:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:01,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:04,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4248 [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:38:04,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:05,443 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-13 10:38:05,586 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-13 10:38:05,766 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-13 10:38:06,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:06,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:06,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:06,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337572021] [2020-10-13 10:38:06,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:06,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:38:06,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514057944] [2020-10-13 10:38:06,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:38:06,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:38:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:38:06,607 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand 26 states. [2020-10-13 10:38:07,391 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-13 10:38:07,603 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-13 10:38:07,916 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-13 10:38:08,173 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-13 10:38:08,541 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2020-10-13 10:38:08,964 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2020-10-13 10:38:09,405 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-13 10:38:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:11,159 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2020-10-13 10:38:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:38:11,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-13 10:38:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:11,161 INFO L225 Difference]: With dead ends: 177 [2020-10-13 10:38:11,161 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 10:38:11,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=403, Invalid=3257, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:38:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 10:38:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 149. [2020-10-13 10:38:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 10:38:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 165 transitions. [2020-10-13 10:38:11,186 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 165 transitions. Word has length 65 [2020-10-13 10:38:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:11,187 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 165 transitions. [2020-10-13 10:38:11,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:38:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 165 transitions. [2020-10-13 10:38:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:38:11,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:11,188 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:11,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:38:11,188 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:11,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1705341423, now seen corresponding path program 7 times [2020-10-13 10:38:11,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:11,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347028469] [2020-10-13 10:38:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:11,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:13,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1929 [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:38:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:13,801 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-13 10:38:14,058 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-13 10:38:15,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:15,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:15,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:15,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:15,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:15,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:15,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:15,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:15,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:15,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347028469] [2020-10-13 10:38:15,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:15,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:38:15,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682278804] [2020-10-13 10:38:15,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:38:15,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:15,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:38:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:38:15,404 INFO L87 Difference]: Start difference. First operand 149 states and 165 transitions. Second operand 31 states. [2020-10-13 10:38:16,078 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-13 10:38:16,552 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-13 10:38:16,786 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-13 10:38:17,134 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 99 [2020-10-13 10:38:17,512 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-13 10:38:17,922 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-13 10:38:18,092 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-13 10:38:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:20,032 INFO L93 Difference]: Finished difference Result 172 states and 191 transitions. [2020-10-13 10:38:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:38:20,033 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-10-13 10:38:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:20,034 INFO L225 Difference]: With dead ends: 172 [2020-10-13 10:38:20,034 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 10:38:20,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=329, Invalid=3331, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:38:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 10:38:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2020-10-13 10:38:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:38:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2020-10-13 10:38:20,061 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 65 [2020-10-13 10:38:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:20,062 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2020-10-13 10:38:20,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:38:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2020-10-13 10:38:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:38:20,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:20,063 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:20,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:38:20,063 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash -298132155, now seen corresponding path program 5 times [2020-10-13 10:38:20,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:20,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961702900] [2020-10-13 10:38:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:20,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:21,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:21,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:22,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:24,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:25,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:38:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:25,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:25,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:25,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:25,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-13 10:38:25,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961702900] [2020-10-13 10:38:25,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:25,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:38:25,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837636003] [2020-10-13 10:38:25,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:38:25,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:38:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:38:25,805 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand 17 states. [2020-10-13 10:38:27,184 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-13 10:38:27,351 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-13 10:38:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:27,451 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2020-10-13 10:38:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:38:27,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-13 10:38:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:27,454 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:38:27,454 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:38:27,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:38:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:38:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2020-10-13 10:38:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 10:38:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2020-10-13 10:38:27,470 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 66 [2020-10-13 10:38:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:27,471 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2020-10-13 10:38:27,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:38:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2020-10-13 10:38:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:38:27,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:27,472 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:27,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:38:27,472 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash -337304010, now seen corresponding path program 11 times [2020-10-13 10:38:27,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:27,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316687524] [2020-10-13 10:38:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:30,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:30,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:38:30,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:38:30,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2764 [2020-10-13 10:38:30,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:38:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:30,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:38:30,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:30,818 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-13 10:38:30,971 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-13 10:38:31,242 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-13 10:38:31,409 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-13 10:38:31,615 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-13 10:38:31,763 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-13 10:38:31,912 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-13 10:38:32,089 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-13 10:38:32,280 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-13 10:38:33,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:33,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:33,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:33,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:33,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:33,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:33,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 17 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:33,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316687524] [2020-10-13 10:38:33,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:33,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:38:33,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647875578] [2020-10-13 10:38:33,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:38:33,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:38:33,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:38:33,248 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand 28 states. [2020-10-13 10:38:33,526 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-13 10:38:34,094 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-13 10:38:34,372 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-13 10:38:34,678 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-13 10:38:35,135 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2020-10-13 10:38:35,461 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 98 [2020-10-13 10:38:35,963 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-13 10:38:36,180 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-10-13 10:38:36,543 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2020-10-13 10:38:36,893 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2020-10-13 10:38:37,112 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-13 10:38:37,323 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-13 10:38:37,938 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-13 10:38:38,146 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 10:38:38,610 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-13 10:38:38,812 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-13 10:38:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:39,012 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-13 10:38:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:38:39,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-13 10:38:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:39,014 INFO L225 Difference]: With dead ends: 141 [2020-10-13 10:38:39,014 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 10:38:39,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=265, Invalid=2597, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:38:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 10:38:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2020-10-13 10:38:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 10:38:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2020-10-13 10:38:39,030 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 66 [2020-10-13 10:38:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:39,030 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2020-10-13 10:38:39,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:38:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2020-10-13 10:38:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:38:39,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:39,031 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:39,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:38:39,032 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1222552125, now seen corresponding path program 12 times [2020-10-13 10:38:39,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:39,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091689848] [2020-10-13 10:38:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:43,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:43,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:38:43,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:38:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4394 [2020-10-13 10:38:43,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:38:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:38:43,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:44,076 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-13 10:38:44,342 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-13 10:38:44,612 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-13 10:38:44,805 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-13 10:38:45,129 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-13 10:38:45,291 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-13 10:38:45,510 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-13 10:38:45,668 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-13 10:38:46,351 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-13 10:38:46,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:46,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:46,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:46,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:46,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:46,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:46,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:46,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:38:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:38:46,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091689848] [2020-10-13 10:38:46,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:46,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:38:46,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702216496] [2020-10-13 10:38:46,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:38:46,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:46,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:38:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:38:46,984 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand 30 states. [2020-10-13 10:38:48,163 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 54 [2020-10-13 10:38:48,368 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2020-10-13 10:38:48,568 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 10:38:48,778 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-13 10:38:49,198 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 61 [2020-10-13 10:38:49,540 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-10-13 10:38:49,793 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 68 [2020-10-13 10:38:50,408 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2020-10-13 10:38:50,982 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2020-10-13 10:38:51,207 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 51 [2020-10-13 10:38:51,585 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2020-10-13 10:38:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:52,761 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2020-10-13 10:38:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:38:52,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-13 10:38:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:52,764 INFO L225 Difference]: With dead ends: 166 [2020-10-13 10:38:52,764 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 10:38:52,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=345, Invalid=2961, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:38:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 10:38:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2020-10-13 10:38:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:38:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2020-10-13 10:38:52,781 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 66 [2020-10-13 10:38:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:52,781 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2020-10-13 10:38:52,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:38:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2020-10-13 10:38:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:38:52,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:52,782 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:52,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:38:52,783 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:52,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1846074140, now seen corresponding path program 9 times [2020-10-13 10:38:52,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:52,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410620575] [2020-10-13 10:38:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:52,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:56,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:56,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:38:56,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:38:56,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3547 [2020-10-13 10:38:56,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:38:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:38:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:38:56,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:57,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:38:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:57,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:38:57,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:38:57,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:38:57,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:38:57,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:38:57,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:38:57,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:38:57,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:38:57,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:38:57,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:38:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:38:57,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410620575] [2020-10-13 10:38:57,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:38:57,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:38:57,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147922392] [2020-10-13 10:38:57,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:38:57,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:38:57,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:38:57,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:38:57,308 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand 24 states. [2020-10-13 10:38:58,070 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 10:38:58,467 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-13 10:38:58,770 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-13 10:38:59,001 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-13 10:38:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:38:59,647 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2020-10-13 10:38:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:38:59,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-13 10:38:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:38:59,649 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:38:59,649 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 10:38:59,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:38:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 10:38:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 146. [2020-10-13 10:38:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 10:38:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2020-10-13 10:38:59,668 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 67 [2020-10-13 10:38:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:38:59,669 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2020-10-13 10:38:59,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:38:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2020-10-13 10:38:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:38:59,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:38:59,670 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:38:59,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:38:59,670 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:38:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:38:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1844364118, now seen corresponding path program 8 times [2020-10-13 10:38:59,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:38:59,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092250067] [2020-10-13 10:38:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:38:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:38:59,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3873 [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:39:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:39:03,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:39:04,188 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-10-13 10:39:04,593 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-13 10:39:04,736 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-13 10:39:04,980 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2020-10-13 10:39:05,141 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-13 10:39:05,372 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-13 10:39:05,537 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-13 10:39:07,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:39:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:39:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:39:07,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:39:07,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:39:07,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:39:07,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:39:07,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:39:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:39:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:39:07,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:39:07,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:39:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:39:07,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092250067] [2020-10-13 10:39:07,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:39:07,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:39:07,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765776506] [2020-10-13 10:39:07,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:39:07,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:39:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:39:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:39:07,172 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand 33 states. [2020-10-13 10:39:07,971 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-13 10:39:08,214 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-13 10:39:08,565 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-13 10:39:08,912 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-10-13 10:39:09,381 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 108 [2020-10-13 10:39:09,625 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-13 10:39:10,417 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-13 10:39:10,653 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-13 10:39:11,283 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-13 10:39:11,976 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-13 10:39:12,237 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-13 10:39:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:39:12,947 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2020-10-13 10:39:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:39:12,948 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-10-13 10:39:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:39:12,949 INFO L225 Difference]: With dead ends: 171 [2020-10-13 10:39:12,949 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 10:39:12,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=347, Invalid=3313, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:39:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 10:39:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 148. [2020-10-13 10:39:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 10:39:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 165 transitions. [2020-10-13 10:39:12,968 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 165 transitions. Word has length 67 [2020-10-13 10:39:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:39:12,969 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 165 transitions. [2020-10-13 10:39:12,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:39:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 165 transitions. [2020-10-13 10:39:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:39:12,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:39:12,969 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:39:12,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:39:12,970 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:39:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:39:12,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1385901279, now seen corresponding path program 10 times [2020-10-13 10:39:12,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:39:12,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017861991] [2020-10-13 10:39:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:39:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:39:13,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:39:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:39:16,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking...