/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=BIGGEST --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-simple/dll2n_insert_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:52:14,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:52:14,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:52:14,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:52:14,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:52:14,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:52:14,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:52:14,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:52:14,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:52:14,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:52:14,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:52:14,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:52:14,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:52:14,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:52:14,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:52:14,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:52:14,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:52:14,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:52:14,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:52:14,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:52:14,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:52:14,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:52:14,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:52:14,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:52:14,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:52:14,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:52:14,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:52:14,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:52:14,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:52:14,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:52:14,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:52:14,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:52:14,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:52:14,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:52:14,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:52:14,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:52:14,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:52:14,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:52:14,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:52:14,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:52:14,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:52:14,914 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 [2020-10-12 15:52:14,936 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:52:14,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:52:14,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:52:14,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:52:14,938 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:52:14,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:52:14,938 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:52:14,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:52:14,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:52:14,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:52:14,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:52:14,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:52:14,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:52:14,940 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:52:14,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:52:14,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:52:14,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:52:14,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:52:14,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:52:14,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:52:14,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:52:14,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:52:14,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:52:14,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:52:14,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:52:14,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:52:14,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:52:14,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:52:14,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:52:14,943 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:52:15,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:52:15,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:52:15,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:52:15,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:52:15,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:52:15,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_insert_equal.i [2020-10-12 15:52:15,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/657a7b51e/fc83ca830db44942b54478baf6c4f8c6/FLAG2efa57ca7 [2020-10-12 15:52:15,910 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:52:15,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_insert_equal.i [2020-10-12 15:52:15,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/657a7b51e/fc83ca830db44942b54478baf6c4f8c6/FLAG2efa57ca7 [2020-10-12 15:52:16,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/657a7b51e/fc83ca830db44942b54478baf6c4f8c6 [2020-10-12 15:52:16,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:52:16,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:52:16,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:16,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:52:16,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:52:16,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69889533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16, skipping insertion in model container [2020-10-12 15:52:16,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:52:16,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:52:16,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:16,748 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:52:16,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:16,872 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:52:16,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16 WrapperNode [2020-10-12 15:52:16,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:16,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:52:16,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:52:16,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:52:16,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:52:16,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:52:16,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:52:16,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:52:16,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (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 [2020-10-12 15:52:17,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:52:17,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:52:17,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:52:17,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:52:17,033 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:52:17,033 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-12 15:52:17,033 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-12 15:52:17,033 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2020-10-12 15:52:17,033 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert [2020-10-12 15:52:17,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:52:17,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:52:17,034 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:52:17,034 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:52:17,034 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:52:17,034 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:52:17,035 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:52:17,035 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:52:17,035 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:52:17,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:52:17,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:52:17,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:52:17,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:52:17,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:52:17,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:52:17,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:52:17,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:52:17,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:52:17,036 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:52:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:52:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:52:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:52:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:52:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:52:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:52:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:52:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:52:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:52:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:52:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:52:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:52:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:52:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:52:17,039 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:52:17,039 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:52:17,039 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:52:17,039 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:52:17,039 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:52:17,039 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:52:17,039 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:52:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:52:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:52:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:52:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:52:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:52:17,040 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:52:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:52:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:52:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:52:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:52:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:52:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:52:17,041 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:52:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:52:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:52:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:52:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:52:17,042 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:52:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:52:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:52:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:52:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:52:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:52:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:52:17,043 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:52:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:52:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:52:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:52:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:52:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:52:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:52:17,044 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:52:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:52:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:52:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:52:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:52:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:52:17,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:52:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:52:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:52:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:52:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:52:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:52:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:52:17,046 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:52:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:52:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:52:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:52:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:52:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:52:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:52:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:52:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:52:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:52:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:52:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:52:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:52:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:52:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:52:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:52:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:52:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-12 15:52:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:52:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:52:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:52:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-12 15:52:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2020-10-12 15:52:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:52:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:52:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert [2020-10-12 15:52:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:52:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:52:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-12 15:52:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:52:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:52:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:52:17,462 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:52:17,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:52:17,664 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 15:52:17,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:17 BoogieIcfgContainer [2020-10-12 15:52:17,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:52:17,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:52:17,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:52:17,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:52:17,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:52:16" (1/3) ... [2020-10-12 15:52:17,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7b618d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:17, skipping insertion in model container [2020-10-12 15:52:17,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (2/3) ... [2020-10-12 15:52:17,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7b618d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:17, skipping insertion in model container [2020-10-12 15:52:17,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:17" (3/3) ... [2020-10-12 15:52:17,678 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_insert_equal.i [2020-10-12 15:52:17,689 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:52:17,698 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:52:17,714 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:52:17,740 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:52:17,741 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:52:17,741 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:52:17,741 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:52:17,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:52:17,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:52:17,742 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:52:17,742 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:52:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-10-12 15:52:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:52:17,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:17,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:17,774 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1788681453, now seen corresponding path program 1 times [2020-10-12 15:52:17,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:17,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918898946] [2020-10-12 15:52:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:18,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:18,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:18,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:52:19,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:52:19,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-12 15:52:19,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:52:19,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:19,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:52:19,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:52:19,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:19,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:19,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:19,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:52:19,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:19,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:19,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:19,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:19,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:19,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 15:52:19,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:52:19,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:19,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-12 15:52:19,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:52:19,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:52:19,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:20,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:20,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:20,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:20,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:20,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:20,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-12 15:52:20,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:20,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:20,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:20,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:20,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:52:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:20,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918898946] [2020-10-12 15:52:20,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:20,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 15:52:20,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871191536] [2020-10-12 15:52:20,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:52:20,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:20,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:52:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:52:20,345 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 15 states. [2020-10-12 15:52:21,452 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-12 15:52:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:21,805 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2020-10-12 15:52:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:52:21,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 15:52:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:21,819 INFO L225 Difference]: With dead ends: 121 [2020-10-12 15:52:21,819 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:52:21,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:52:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:52:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-12 15:52:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:52:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-10-12 15:52:21,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 31 [2020-10-12 15:52:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:21,881 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-10-12 15:52:21,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:52:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-10-12 15:52:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:52:21,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:21,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:21,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:52:21,885 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 27883416, now seen corresponding path program 1 times [2020-10-12 15:52:21,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:21,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589222445] [2020-10-12 15:52:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:21,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:21,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:52:22,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-12 15:52:22,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:22,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:22,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:22,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:52:22,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:22,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:22,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:52:22,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:22,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:52:22,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:22,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:52:22,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:22,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:22,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:52:22,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:22,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-12 15:52:22,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:52:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:22,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 15:52:22,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:22,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:22,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:52:22,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:22,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:22,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:22,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:22,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589222445] [2020-10-12 15:52:22,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:22,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:52:22,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069597660] [2020-10-12 15:52:22,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:52:22,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:52:22,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:52:22,920 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 8 states. [2020-10-12 15:52:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:23,267 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2020-10-12 15:52:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:52:23,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-12 15:52:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:23,271 INFO L225 Difference]: With dead ends: 79 [2020-10-12 15:52:23,272 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 15:52:23,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:52:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 15:52:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-12 15:52:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 15:52:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-12 15:52:23,297 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2020-10-12 15:52:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:23,298 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-12 15:52:23,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:52:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-12 15:52:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:52:23,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:23,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:23,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:52:23,304 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1678266614, now seen corresponding path program 1 times [2020-10-12 15:52:23,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:23,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471505888] [2020-10-12 15:52:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:23,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:23,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:23,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:25,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:52:28,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:52:28,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:52:28,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:52:28,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:28,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:52:28,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 15:52:28,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:28,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:52:28,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:28,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:28,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:28,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:28,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:28,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-12 15:52:28,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:52:28,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:28,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:52:28,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:28,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-12 15:52:28,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:52:28,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:28,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:52:29,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:29,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:29,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:29,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 15:52:29,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:29,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:29,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471505888] [2020-10-12 15:52:29,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:29,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-12 15:52:29,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047755603] [2020-10-12 15:52:29,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:52:29,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:52:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:52:29,463 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 16 states. [2020-10-12 15:52:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:30,291 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-10-12 15:52:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:52:30,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 15:52:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:30,292 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:52:30,293 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:52:30,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:52:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:52:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 15:52:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 15:52:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-12 15:52:30,311 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 37 [2020-10-12 15:52:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:30,312 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-12 15:52:30,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:52:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-12 15:52:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:52:30,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:30,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:30,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:52:30,314 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1807354056, now seen corresponding path program 1 times [2020-10-12 15:52:30,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:30,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297409318] [2020-10-12 15:52:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:30,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:30,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:30,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:52:32,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:32,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1757 [2020-10-12 15:52:32,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:52:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:32,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:52:32,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:32,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:32,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:32,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:52:32,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:32,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:32,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:32,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:32,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:32,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 15:52:32,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:52:32,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:32,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:52:32,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:32,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-12 15:52:32,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:52:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:32,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:32,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:33,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:33,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:33,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 15:52:33,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:52:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:33,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:33,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:33,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297409318] [2020-10-12 15:52:33,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:33,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-10-12 15:52:33,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395941521] [2020-10-12 15:52:33,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:52:33,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:33,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:52:33,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:52:33,154 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 21 states. [2020-10-12 15:52:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:34,119 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-12 15:52:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:52:34,120 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-12 15:52:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:34,121 INFO L225 Difference]: With dead ends: 60 [2020-10-12 15:52:34,121 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:52:34,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:52:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:52:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-10-12 15:52:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:52:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-12 15:52:34,141 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 37 [2020-10-12 15:52:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:34,142 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-12 15:52:34,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:52:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-12 15:52:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:52:34,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:34,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:34,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:52:34,148 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:34,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1807355730, now seen corresponding path program 1 times [2020-10-12 15:52:34,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:34,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780376096] [2020-10-12 15:52:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:34,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:34,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:34,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:35,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:52:38,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:52:38,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4387 [2020-10-12 15:52:38,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:52:38,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:38,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:52:38,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:38,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:38,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:38,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:38,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:38,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:38,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-12 15:52:38,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:52:38,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:52:39,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:39,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-12 15:52:39,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:52:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:39,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:53:02,529 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2020-10-12 15:53:08,629 WARN L193 SmtUtils]: Spent 5.60 s on a formula simplification. DAG size of input: 314 DAG size of output: 177 [2020-10-12 15:53:45,232 WARN L193 SmtUtils]: Spent 28.67 s on a formula simplification. DAG size of input: 722 DAG size of output: 205 [2020-10-12 15:53:59,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:59,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:59,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:59,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:59,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 15:53:59,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:59,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:59,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:59,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:54:00,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780376096] [2020-10-12 15:54:00,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:54:00,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-12 15:54:00,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649734337] [2020-10-12 15:54:00,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:54:00,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:54:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:54:00,298 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 20 states. [2020-10-12 15:54:48,080 WARN L193 SmtUtils]: Spent 41.44 s on a formula simplification. DAG size of input: 371 DAG size of output: 269 [2020-10-12 15:54:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:55,862 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-12 15:54:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:54:55,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-12 15:54:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:55,865 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:54:55,865 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 15:54:55,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 104.3s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:54:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 15:54:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-10-12 15:54:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:54:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-12 15:54:55,876 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 37 [2020-10-12 15:54:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:55,877 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-12 15:54:55,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:54:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-12 15:54:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:54:55,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:55,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:54:55,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:54:55,879 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1192899781, now seen corresponding path program 1 times [2020-10-12 15:54:55,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:55,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025051035] [2020-10-12 15:54:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:56,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:56,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:57,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:57,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:54:57,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:54:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-12 15:54:57,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:54:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:54:57,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:57,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:57,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:57,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:57,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:57,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:57,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:57,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:57,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:57,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:57,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:57,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:57,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:57,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:57,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:57,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:57,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:54:57,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:57,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 15:54:57,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:54:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:54:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:54:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:58,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:58,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:54:58,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:58,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 15:54:58,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:54:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:58,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:54:58,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:58,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:54:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:58,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:58,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:58,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:58,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:54:58,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:58,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:54:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:58,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:58,881 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-12 15:54:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:54:58,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025051035] [2020-10-12 15:54:58,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:58,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:54:58,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088096505] [2020-10-12 15:54:58,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:54:58,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:54:58,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:54:58,896 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 19 states. [2020-10-12 15:55:00,243 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-12 15:55:00,490 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-12 15:55:00,793 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-12 15:55:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:01,309 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-12 15:55:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:55:01,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-12 15:55:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:01,312 INFO L225 Difference]: With dead ends: 80 [2020-10-12 15:55:01,312 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 15:55:01,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:55:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 15:55:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-10-12 15:55:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:55:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-12 15:55:01,325 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 37 [2020-10-12 15:55:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:01,326 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-12 15:55:01,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:55:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-12 15:55:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:55:01,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:01,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:01,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:55:01,328 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1327060153, now seen corresponding path program 1 times [2020-10-12 15:55:01,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:01,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354316194] [2020-10-12 15:55:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:01,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:01,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:02,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:02,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:55:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:55:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-12 15:55:02,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:55:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:55:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:02,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:02,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:02,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:02,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:02,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:02,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:02,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:02,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:02,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:02,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:02,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:02,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:55:02,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:02,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 15:55:02,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:02,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:55:02,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:02,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:55:02,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:02,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:55:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:02,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:02,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:02,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:55:02,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-12 15:55:02,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:55:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:02,894 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-12 15:55:03,147 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-12 15:55:03,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:03,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:03,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:03,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 15:55:03,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:55:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:55:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:03,851 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-12 15:55:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:55:03,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354316194] [2020-10-12 15:55:03,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:03,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:55:03,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834945172] [2020-10-12 15:55:03,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:55:03,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:03,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:55:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:55:03,865 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 22 states. [2020-10-12 15:55:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:05,868 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-10-12 15:55:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:55:05,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-12 15:55:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:05,875 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:55:05,875 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:55:05,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:55:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:55:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-10-12 15:55:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:55:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-12 15:55:05,911 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 37 [2020-10-12 15:55:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:05,912 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-12 15:55:05,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:55:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-12 15:55:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:55:05,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:05,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:05,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:55:05,915 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash 844629017, now seen corresponding path program 2 times [2020-10-12 15:55:05,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:05,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321191727] [2020-10-12 15:55:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:05,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:06,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:06,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:06,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:55:06,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:55:06,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-12 15:55:06,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:55:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:55:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:55:06,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:06,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:06,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:06,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:06,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:06,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:06,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:06,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:06,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:06,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:06,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:06,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:06,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:06,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:06,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:55:06,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:06,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:55:06,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:06,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:55:06,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:06,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:55:06,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:06,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:55:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:06,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:06,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:06,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:55:06,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:06,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 15:55:06,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:55:06,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:55:06,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:55:06,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:06,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:06,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:06,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:06,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:06,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:06,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:55:06,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:06,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:55:06,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:06,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:55:06,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:55:06,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321191727] [2020-10-12 15:55:06,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:06,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:55:06,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835392985] [2020-10-12 15:55:06,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:55:06,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:06,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:55:06,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:55:06,860 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 10 states. [2020-10-12 15:55:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:07,230 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-10-12 15:55:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:55:07,232 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-12 15:55:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:07,233 INFO L225 Difference]: With dead ends: 95 [2020-10-12 15:55:07,234 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 15:55:07,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:55:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 15:55:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2020-10-12 15:55:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 15:55:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-12 15:55:07,248 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 38 [2020-10-12 15:55:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:07,248 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-12 15:55:07,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:55:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-12 15:55:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:55:07,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:07,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:07,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:55:07,251 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2058509770, now seen corresponding path program 1 times [2020-10-12 15:55:07,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:07,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358660337] [2020-10-12 15:55:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:09,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:09,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:55:09,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:09,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1849 [2020-10-12 15:55:09,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:09,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 15:55:09,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:09,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:55:09,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:09,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:09,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:09,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:09,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:09,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:09,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:09,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:09,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:09,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:09,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:09,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:09,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:55:09,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:09,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 15:55:09,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:09,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:55:09,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:09,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:55:09,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:09,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:55:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:09,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:09,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:09,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:55:09,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-12 15:55:09,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:55:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:09,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:10,625 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:55:11,200 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-12 15:55:11,966 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 88 [2020-10-12 15:55:13,708 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 156 DAG size of output: 133 [2020-10-12 15:55:14,529 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 43 [2020-10-12 15:55:14,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:14,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:14,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-12 15:55:14,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:55:14,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:14,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:55:14,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:15,835 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 46 [2020-10-12 15:55:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:55:15,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358660337] [2020-10-12 15:55:15,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:15,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:55:15,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002014109] [2020-10-12 15:55:15,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:55:15,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:15,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:55:15,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:55:15,859 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 26 states. [2020-10-12 15:55:20,057 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 154 DAG size of output: 140 [2020-10-12 15:55:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:21,862 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2020-10-12 15:55:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:55:21,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2020-10-12 15:55:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:21,866 INFO L225 Difference]: With dead ends: 92 [2020-10-12 15:55:21,866 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 15:55:21,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:55:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 15:55:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-10-12 15:55:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:55:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-12 15:55:21,879 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 42 [2020-10-12 15:55:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:21,880 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-12 15:55:21,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:55:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-12 15:55:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:55:21,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:21,881 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:21,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:55:21,882 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:21,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2058508096, now seen corresponding path program 1 times [2020-10-12 15:55:21,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:21,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577493129] [2020-10-12 15:55:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:21,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:22,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:22,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:22,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:26,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:26,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:55:26,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:55:26,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4361 [2020-10-12 15:55:26,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:26,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:55:26,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:26,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:55:26,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:26,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:26,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:26,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:26,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:26,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:26,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:26,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:26,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:26,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:26,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:55:26,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:26,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 15:55:26,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:26,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:55:26,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:55:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:26,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:55:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:26,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:27,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:27,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:27,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:55:27,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:55:27,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-12 15:55:27,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:27,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:55:27,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:27,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:27,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:27,998 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-12 15:55:28,290 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-12 15:55:29,114 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 81 [2020-10-12 15:55:29,546 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2020-10-12 15:55:29,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:29,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:29,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:29,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:29,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:29,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-12 15:55:29,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:55:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:55:29,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:30,034 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-12 15:55:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:55:30,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577493129] [2020-10-12 15:55:30,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:30,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:55:30,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672027960] [2020-10-12 15:55:30,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:55:30,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:55:30,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:55:30,054 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 24 states. [2020-10-12 15:55:33,453 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 15:55:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:34,421 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-12 15:55:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:55:34,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-10-12 15:55:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:34,425 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:55:34,426 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 15:55:34,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:55:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 15:55:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-12 15:55:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:55:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-12 15:55:34,436 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 42 [2020-10-12 15:55:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:34,437 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-12 15:55:34,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:55:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-12 15:55:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:55:34,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:34,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:34,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:55:34,438 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1700413325, now seen corresponding path program 1 times [2020-10-12 15:55:34,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:34,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656092494] [2020-10-12 15:55:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:34,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:34,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:34,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:35,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:35,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:55:35,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:55:35,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-12 15:55:35,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:35,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:55:35,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:35,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:55:35,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:35,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:35,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:35,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:35,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:35,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:35,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:35,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:35,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:35,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:55:35,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:35,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:35,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:35,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:55:35,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:35,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 15:55:35,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:55:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:55:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:55:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:35,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:36,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:36,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:36,488 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-12 15:55:36,821 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-12 15:55:37,447 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-12 15:55:37,846 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-12 15:55:37,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:37,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:38,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:38,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:38,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:38,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 15:55:38,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:55:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:38,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:55:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:38,889 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 40 [2020-10-12 15:55:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:55:38,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656092494] [2020-10-12 15:55:38,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:38,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:55:38,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569683906] [2020-10-12 15:55:38,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:55:38,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:38,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:55:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:55:38,908 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 25 states. [2020-10-12 15:55:41,163 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 15:55:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:41,882 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-10-12 15:55:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:55:41,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 39 [2020-10-12 15:55:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:41,885 INFO L225 Difference]: With dead ends: 85 [2020-10-12 15:55:41,885 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 15:55:41,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:55:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 15:55:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-10-12 15:55:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 15:55:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-12 15:55:41,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 39 [2020-10-12 15:55:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:41,898 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-12 15:55:41,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:55:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-12 15:55:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:55:41,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:41,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:41,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:55:41,900 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1700414999, now seen corresponding path program 1 times [2020-10-12 15:55:41,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:41,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587751440] [2020-10-12 15:55:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:41,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:41,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:42,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:42,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:42,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:55:42,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:55:42,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-12 15:55:42,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:42,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:55:42,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 15:55:42,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:55:42,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:42,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:42,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:42,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:42,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:42,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:42,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:55:42,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:42,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:42,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:42,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:43,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:43,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:43,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:43,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:55:43,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:43,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:55:43,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:43,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:43,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:43,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:43,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:43,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:55:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:43,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:43,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:43,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:55:43,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:43,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 15:55:43,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:55:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:55:43,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:44,274 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2020-10-12 15:55:44,584 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2020-10-12 15:55:44,725 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2020-10-12 15:55:44,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:44,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:44,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:44,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:44,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:44,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:55:44,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:44,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:55:44,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:44,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:55:44,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:55:44,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587751440] [2020-10-12 15:55:44,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:44,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:55:44,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822871536] [2020-10-12 15:55:44,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:55:44,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:44,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:55:44,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:55:44,747 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 12 states. [2020-10-12 15:55:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:45,534 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-10-12 15:55:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:55:45,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-12 15:55:45,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:45,537 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:55:45,537 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 15:55:45,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:55:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 15:55:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-10-12 15:55:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:55:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-12 15:55:45,548 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 39 [2020-10-12 15:55:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:45,549 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-12 15:55:45,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:55:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-12 15:55:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:55:45,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:45,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:45,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:55:45,551 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:45,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1908734900, now seen corresponding path program 2 times [2020-10-12 15:55:45,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:45,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625279466] [2020-10-12 15:55:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:45,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:46,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:46,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:55:46,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:55:46,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-12 15:55:46,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:46,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:55:46,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:55:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:55:46,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:46,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:46,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:46,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:46,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:46,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:46,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:46,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:46,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:46,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:46,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:46,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:55:46,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:46,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 15:55:46,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:46,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:55:46,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:46,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:55:46,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:46,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:55:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:46,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:46,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:55:46,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:46,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:46,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:46,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:46,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:46,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:55:46,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:55:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:55:46,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:55:46,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625279466] [2020-10-12 15:55:46,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:46,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:55:46,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573030790] [2020-10-12 15:55:46,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:55:46,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:46,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:55:46,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:55:46,294 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 12 states. [2020-10-12 15:55:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:46,825 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-12 15:55:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:55:46,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-12 15:55:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:46,829 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:55:46,829 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 15:55:46,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:55:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 15:55:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-12 15:55:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:55:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-12 15:55:46,840 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 43 [2020-10-12 15:55:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:46,841 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-12 15:55:46,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:55:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-12 15:55:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:55:46,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:46,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:46,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:55:46,842 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1751987579, now seen corresponding path program 1 times [2020-10-12 15:55:46,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:46,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940215509] [2020-10-12 15:55:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:48,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:48,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:55:48,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:48,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1382 [2020-10-12 15:55:48,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:48,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:55:48,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:55:48,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:48,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:48,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:48,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:48,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:48,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:48,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:48,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:48,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:48,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:55:48,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-12 15:55:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:55:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:55:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:48,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:55:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:48,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:49,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:49,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:55:49,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-12 15:55:49,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:55:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:49,636 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 15:55:50,155 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2020-10-12 15:55:50,373 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-12 15:55:50,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:50,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:50,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:50,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:50,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:55:50,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:50,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:55:50,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:50,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:55:50,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:55:50,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940215509] [2020-10-12 15:55:50,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:50,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:55:50,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785884424] [2020-10-12 15:55:50,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:55:50,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:50,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:55:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:55:50,888 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 27 states. [2020-10-12 15:55:52,871 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-12 15:55:53,665 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 15:55:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:54,514 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-12 15:55:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:55:54,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-12 15:55:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:54,517 INFO L225 Difference]: With dead ends: 81 [2020-10-12 15:55:54,517 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 15:55:54,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:55:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 15:55:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-10-12 15:55:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:55:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-12 15:55:54,532 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 44 [2020-10-12 15:55:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:54,533 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-12 15:55:54,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:55:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-12 15:55:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:55:54,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:54,534 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:54,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:55:54,534 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1751989253, now seen corresponding path program 1 times [2020-10-12 15:55:54,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:54,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538362138] [2020-10-12 15:55:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:54,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:55,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:58,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3625 [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:55:58,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:58,401 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-12 15:55:58,589 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-12 15:55:58,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:58,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:58,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:58,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:58,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:58,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:58,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:58,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:58,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:55:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:59,162 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-12 15:55:59,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:55:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:59,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:59,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:59,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:55:59,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:59,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-12 15:55:59,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:55:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:59,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0