/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_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:52:32,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:52:32,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:52:32,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:52:32,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:52:32,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:52:32,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:52:32,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:52:32,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:52:32,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:52:32,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:52:32,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:52:32,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:52:32,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:52:32,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:52:32,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:52:32,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:52:32,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:52:32,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:52:32,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:52:32,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:52:32,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:52:32,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:52:32,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:52:32,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:52:32,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:52:32,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:52:32,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:52:32,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:52:32,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:52:32,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:52:32,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:52:32,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:52:32,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:52:32,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:52:32,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:52:32,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:52:32,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:52:32,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:52:32,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:52:32,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:52:32,899 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 15:52:32,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:52:32,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:52:32,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:52:32,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:52:32,946 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:52:32,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:52:32,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:52:32,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:52:32,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:52:32,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:52:32,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:52:32,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:52:32,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:52:32,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:52:32,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:52:32,950 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:52:32,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:52:32,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:52:32,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:52:32,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:52:32,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:52:32,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:52:32,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:52:32,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:52:32,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:52:32,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:52:32,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:52:32,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:52:32,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:52:32,952 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 15:52:33,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:52:33,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:52:33,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:52:33,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:52:33,275 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:52:33,275 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i [2020-10-12 15:52:33,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25bb0fd67/c25973556eb7494ea4a89e20d113df44/FLAGc22648518 [2020-10-12 15:52:33,810 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:52:33,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_remove_all_reverse.i [2020-10-12 15:52:33,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25bb0fd67/c25973556eb7494ea4a89e20d113df44/FLAGc22648518 [2020-10-12 15:52:34,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25bb0fd67/c25973556eb7494ea4a89e20d113df44 [2020-10-12 15:52:34,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:52:34,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:52:34,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:34,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:52:34,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:52:34,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:34,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f61c153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34, skipping insertion in model container [2020-10-12 15:52:34,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:34,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:52:34,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:52:34,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:34,767 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:52:34,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:34,930 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:52:34,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34 WrapperNode [2020-10-12 15:52:34,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:34,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:52:34,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:52:34,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:52:34,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:34,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:34,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:34,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:35,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:35,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:35,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... [2020-10-12 15:52:35,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:52:35,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:52:35,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:52:35,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:52:35,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:52:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:52:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:52:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:52:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:52:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:52:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-12 15:52:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-12 15:52:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_last [2020-10-12 15:52:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:52:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:52:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:52:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:52:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:52:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:52:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:52:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:52:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:52:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:52:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:52:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:52:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:52:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:52:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:52:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:52:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:52:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:52:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:52:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:52:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:52:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:52:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:52:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:52:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:52:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:52:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:52:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:52:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:52:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:52:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:52:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:52:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:52:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:52:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:52:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:52:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:52:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:52:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:52:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:52:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:52:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:52:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:52:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:52:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:52:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:52:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:52:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:52:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:52:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:52:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:52:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:52:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:52:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:52:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:52:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:52:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:52:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:52:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:52:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:52:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:52:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:52:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:52:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:52:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:52:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:52:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:52:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:52:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:52:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:52:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:52:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:52:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:52:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:52:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:52:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:52:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:52:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:52:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:52:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:52:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:52:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:52:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:52:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:52:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:52:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:52:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:52:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:52:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:52:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:52:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:52:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:52:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:52:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:52:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:52:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:52:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:52:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:52:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:52:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:52:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:52:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:52:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:52:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:52:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:52:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:52:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:52:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:52:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-12 15:52:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:52:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:52:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:52:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-12 15:52:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_last [2020-10-12 15:52:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:52:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:52:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:52:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:52:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-12 15:52:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:52:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:52:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:52:35,505 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:52:35,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:52:35,736 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 15:52:35,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:35 BoogieIcfgContainer [2020-10-12 15:52:35,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:52:35,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:52:35,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:52:35,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:52:35,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:52:34" (1/3) ... [2020-10-12 15:52:35,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46462646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:35, skipping insertion in model container [2020-10-12 15:52:35,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:34" (2/3) ... [2020-10-12 15:52:35,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46462646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:35, skipping insertion in model container [2020-10-12 15:52:35,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:35" (3/3) ... [2020-10-12 15:52:35,749 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2020-10-12 15:52:35,760 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:52:35,768 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:52:35,783 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:52:35,808 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:52:35,808 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:52:35,808 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:52:35,809 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:52:35,809 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:52:35,809 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:52:35,809 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:52:35,809 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:52:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-12 15:52:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:52:35,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:35,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:35,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash 69017892, now seen corresponding path program 1 times [2020-10-12 15:52:35,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:35,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050353281] [2020-10-12 15:52:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:36,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:36,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:52:36,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:36,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-12 15:52:36,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:36,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:36,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:52:36,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:52:36,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:52:36,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:36,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:36,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:36,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:36,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:52:36,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:36,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:36,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:36,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:36,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:36,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:36,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:36,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:36,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:36,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:36,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 15:52:36,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:36,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:36,918 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 15:52:36,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050353281] [2020-10-12 15:52:36,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:36,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:52:36,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833094288] [2020-10-12 15:52:36,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:52:36,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:36,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:52:36,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:52:36,946 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 9 states. [2020-10-12 15:52:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:37,332 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2020-10-12 15:52:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:52:37,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 15:52:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:37,346 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:52:37,346 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:52:37,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:52:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:52:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-12 15:52:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:52:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-12 15:52:37,406 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 17 [2020-10-12 15:52:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:37,407 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-12 15:52:37,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:52:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-12 15:52:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:52:37,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:37,409 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] [2020-10-12 15:52:37,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:52:37,410 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -735269824, now seen corresponding path program 1 times [2020-10-12 15:52:37,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:37,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987841126] [2020-10-12 15:52:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:37,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:37,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:37,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:37,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:52:37,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:37,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-12 15:52:37,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:52:37,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:52:37,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 15:52:37,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:37,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:37,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:37,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:37,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:52:37,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:37,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:37,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:37,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:52:37,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:37,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:38,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:38,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-12 15:52:38,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:52:38,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:38,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987841126] [2020-10-12 15:52:38,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:38,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:52:38,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017790677] [2020-10-12 15:52:38,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:52:38,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:52:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:52:38,073 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-12 15:52:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:38,284 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-12 15:52:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:52:38,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 15:52:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:38,286 INFO L225 Difference]: With dead ends: 56 [2020-10-12 15:52:38,287 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 15:52:38,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:52:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 15:52:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-12 15:52:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 15:52:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-12 15:52:38,297 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2020-10-12 15:52:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:38,298 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-12 15:52:38,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:52:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-12 15:52:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:52:38,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:38,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:38,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:52:38,300 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash -642756753, now seen corresponding path program 1 times [2020-10-12 15:52:38,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:38,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136828278] [2020-10-12 15:52:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:52:39,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-12 15:52:39,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:52:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:39,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:39,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:39,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:39,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:39,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:39,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:39,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-12 15:52:39,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:52:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:52:39,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:39,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 15:52:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:52:39,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:39,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:52:39,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 15:52:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:39,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:39,553 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 15:52:39,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136828278] [2020-10-12 15:52:39,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:39,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:52:39,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943361085] [2020-10-12 15:52:39,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:52:39,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:39,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:52:39,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:52:39,556 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-12 15:52:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:39,768 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-12 15:52:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:52:39,768 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-12 15:52:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:39,769 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:52:39,770 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:52:39,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:52:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:52:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-12 15:52:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:52:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 15:52:39,778 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-10-12 15:52:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:39,778 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 15:52:39,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:52:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 15:52:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:52:39,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:39,780 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] [2020-10-12 15:52:39,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:52:39,780 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:39,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1124578227, now seen corresponding path program 1 times [2020-10-12 15:52:39,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:39,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137519270] [2020-10-12 15:52:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:40,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:40,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:44,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:52:44,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:52:44,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4950 [2020-10-12 15:52:44,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:52:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:52:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:44,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:44,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:44,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:44,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:44,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:44,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:44,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:44,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:44,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:44,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:44,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:44,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:52:44,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:44,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-12 15:52:44,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:52:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:52:44,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:45,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:52:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:45,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:45,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:45,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:52:45,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:45,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 15:52:45,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:52:45,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:45,181 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 15:52:45,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137519270] [2020-10-12 15:52:45,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:45,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:52:45,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939889214] [2020-10-12 15:52:45,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:52:45,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:45,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:52:45,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:52:45,184 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 15 states. [2020-10-12 15:52:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:45,913 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-12 15:52:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:52:45,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:52:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:45,915 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:52:45,915 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 15:52:45,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:52:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 15:52:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-12 15:52:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:52:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-12 15:52:45,927 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2020-10-12 15:52:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:45,928 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-12 15:52:45,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:52:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-12 15:52:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:52:45,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:45,930 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] [2020-10-12 15:52:45,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:52:45,931 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1176244363, now seen corresponding path program 2 times [2020-10-12 15:52:45,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:45,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194641672] [2020-10-12 15:52:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:45,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:48,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:48,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:52:48,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:52:48,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2199 [2020-10-12 15:52:48,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:52:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:52:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:48,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:48,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:48,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:48,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:48,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:48,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:48,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:48,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:48,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:48,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:48,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:48,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:52:48,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:48,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 15:52:48,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:52:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:52:48,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:48,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:52:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:48,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:48,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:52:48,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:48,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:52:48,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:48,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:52:48,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:48,470 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 15:52:48,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194641672] [2020-10-12 15:52:48,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:48,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:52:48,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635732071] [2020-10-12 15:52:48,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:52:48,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:52:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:52:48,473 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 14 states. [2020-10-12 15:52:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:48,947 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-12 15:52:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:52:48,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:52:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:48,948 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:52:48,948 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 15:52:48,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:52:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 15:52:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-12 15:52:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:52:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-12 15:52:48,957 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 34 [2020-10-12 15:52:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:48,957 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-12 15:52:48,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:52:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-12 15:52:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:52:48,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:48,959 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] [2020-10-12 15:52:48,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:52:48,959 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:48,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1950255278, now seen corresponding path program 1 times [2020-10-12 15:52:48,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:48,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459632723] [2020-10-12 15:52:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:48,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:52:49,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-12 15:52:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:52:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:52:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:52:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:49,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:49,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:49,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:49,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:49,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:49,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:49,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:49,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:52:49,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:49,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-12 15:52:49,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:49,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:52:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:49,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:52:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:50,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:50,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:52:50,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:50,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 15:52:50,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:50,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:50,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:52:50,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:52:50,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:50,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459632723] [2020-10-12 15:52:50,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:50,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:52:50,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414408495] [2020-10-12 15:52:50,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:52:50,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:50,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:52:50,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:52:50,130 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 14 states. [2020-10-12 15:52:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:50,787 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-12 15:52:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:52:50,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-12 15:52:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:50,789 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:52:50,789 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 15:52:50,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:52:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 15:52:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 15:52:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 15:52:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-12 15:52:50,797 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2020-10-12 15:52:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:50,798 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-12 15:52:50,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:52:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-12 15:52:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:52:50,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:50,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:50,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:52:50,800 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash -731440388, now seen corresponding path program 1 times [2020-10-12 15:52:50,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:50,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495104004] [2020-10-12 15:52:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:50,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:50,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:52:50,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-12 15:52:50,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 15:52:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:51,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:51,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:51,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:51,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:51,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:51,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:51,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:51,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:51,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:51,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:52:51,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:51,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 15:52:51,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:51,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:52:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:51,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:51,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:52:51,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:51,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:52:51,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:51,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:51,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:51,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:51,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:51,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 15:52:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:51,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:51,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:52:51,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:51,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:52:51,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:51,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 15:52:51,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495104004] [2020-10-12 15:52:51,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:51,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:52:51,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272950282] [2020-10-12 15:52:51,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:52:51,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:52:51,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:52:51,133 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 9 states. [2020-10-12 15:52:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:51,419 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-12 15:52:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:52:51,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-12 15:52:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:51,421 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:52:51,421 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 15:52:51,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:52:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 15:52:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 15:52:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 15:52:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-12 15:52:51,433 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 46 [2020-10-12 15:52:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:51,434 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-12 15:52:51,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:52:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-12 15:52:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:52:51,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:51,438 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:51,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:52:51,438 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:51,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1560929276, now seen corresponding path program 1 times [2020-10-12 15:52:51,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:51,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588595203] [2020-10-12 15:52:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:56,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:56,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:52:56,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:52:56,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:52:56,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:52:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:56,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:52:56,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:56,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:56,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:56,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:56,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:56,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:56,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:56,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:56,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:56,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:56,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:56,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:56,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:56,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:56,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:56,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:52:56,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:56,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-12 15:52:56,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:52:56,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:52:57,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:52:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:57,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:57,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:57,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:52:57,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:57,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-12 15:52:57,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:52:57,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 15:52:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:57,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:57,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:52:57,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:57,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 15:52:57,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:57,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:57,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:57,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:52:57,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:52:57,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588595203] [2020-10-12 15:52:57,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:57,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:52:57,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500515387] [2020-10-12 15:52:57,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:52:57,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:57,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:52:57,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:52:57,686 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 21 states. [2020-10-12 15:52:58,412 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-12 15:52:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:59,100 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-12 15:52:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:52:59,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-12 15:52:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:59,103 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:52:59,103 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 15:52:59,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:52:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 15:52:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 15:52:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:52:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-12 15:52:59,112 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 51 [2020-10-12 15:52:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:59,112 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-12 15:52:59,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:52:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-12 15:52:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:52:59,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:59,113 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:59,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:52:59,114 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash 993141737, now seen corresponding path program 2 times [2020-10-12 15:52:59,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:59,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496170962] [2020-10-12 15:52:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:59,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:59,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:59,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:59,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:02,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:03,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:03,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:04,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:53:04,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:53:04,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-12 15:53:04,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:53:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:53:04,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:53:04,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:53:04,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:04,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:04,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:04,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:04,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:53:04,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:04,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:04,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:04,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:04,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:04,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:04,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:04,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-12 15:53:04,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:53:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:53:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:05,251 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-12 15:53:05,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:53:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:05,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:05,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:05,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:05,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:53:05,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:05,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-12 15:53:05,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:05,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:53:05,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:05,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:53:05,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:06,241 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-12 15:53:06,583 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-12 15:53:06,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 15:53:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:06,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:06,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:53:06,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:06,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 15:53:06,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:53:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:53:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:53:07,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496170962] [2020-10-12 15:53:07,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:07,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:53:07,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681282148] [2020-10-12 15:53:07,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:53:07,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:07,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:53:07,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:53:07,069 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 26 states. [2020-10-12 15:53:07,870 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-12 15:53:08,845 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:53:09,399 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-12 15:53:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:09,744 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-12 15:53:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:53:09,745 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-10-12 15:53:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:09,746 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:53:09,747 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:53:09,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:53:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:53:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-12 15:53:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:53:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-12 15:53:09,759 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2020-10-12 15:53:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:09,760 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-12 15:53:09,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:53:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-12 15:53:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:53:09,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:09,761 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:09,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:53:09,762 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:09,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1265908082, now seen corresponding path program 3 times [2020-10-12 15:53:09,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:09,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329302265] [2020-10-12 15:53:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:09,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:10,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:10,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:14,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:14,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:53:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:14,967 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-12 15:53:15,113 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-12 15:53:15,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:15,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:15,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:15,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:15,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:15,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:15,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:15,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:15,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:15,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:15,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:15,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:15,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:15,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:15,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:15,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:15,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:15,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:53:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-12 15:53:15,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:53:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:53:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:15,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:53:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:16,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:16,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:53:16,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:16,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-12 15:53:16,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:53:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:53:16,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:16,870 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-12 15:53:17,062 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-12 15:53:17,397 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-12 15:53:17,829 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-12 15:53:18,927 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 113 [2020-10-12 15:53:18,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 15:53:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:18,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:18,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:53:18,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:18,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 15:53:18,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:18,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:18,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:53:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:53:19,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329302265] [2020-10-12 15:53:19,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:19,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:53:19,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278160583] [2020-10-12 15:53:19,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:53:19,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:53:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:53:19,108 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 27 states. [2020-10-12 15:53:20,811 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-12 15:53:20,994 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-12 15:53:21,244 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-12 15:53:21,615 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-10-12 15:53:22,164 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 15:53:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:22,385 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-10-12 15:53:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:53:22,385 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-10-12 15:53:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:22,387 INFO L225 Difference]: With dead ends: 100 [2020-10-12 15:53:22,387 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:53:22,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:53:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:53:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-12 15:53:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:53:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-10-12 15:53:22,400 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 55 [2020-10-12 15:53:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:22,401 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-10-12 15:53:22,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:53:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-10-12 15:53:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:53:22,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:22,402 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:22,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:53:22,403 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1040667635, now seen corresponding path program 4 times [2020-10-12 15:53:22,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:22,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792599010] [2020-10-12 15:53:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:22,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:22,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:23,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:24,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:26,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:26,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:27,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:27,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:53:27,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:53:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:53:27,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:53:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:53:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:27,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:27,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:27,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:27,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:27,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:27,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:27,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:27,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:27,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:28,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:28,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:28,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:28,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:53:28,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-12 15:53:28,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:53:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:53:28,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:28,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:53:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:28,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:28,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:28,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:28,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:28,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-12 15:53:28,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:28,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:53:28,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:28,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:53:28,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:29,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 15:53:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:29,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:29,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:53:29,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:53:29,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792599010] [2020-10-12 15:53:29,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:29,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:53:29,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375379327] [2020-10-12 15:53:29,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:53:29,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:29,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:53:29,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:53:29,771 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 28 states. [2020-10-12 15:53:31,984 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2020-10-12 15:53:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:32,527 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-10-12 15:53:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:53:32,528 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-10-12 15:53:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:32,529 INFO L225 Difference]: With dead ends: 105 [2020-10-12 15:53:32,530 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 15:53:32,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:53:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 15:53:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-10-12 15:53:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:53:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-12 15:53:32,543 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 57 [2020-10-12 15:53:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:32,544 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-12 15:53:32,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:53:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-12 15:53:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:53:32,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:32,545 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:32,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:53:32,545 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1490491705, now seen corresponding path program 5 times [2020-10-12 15:53:32,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:32,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734844438] [2020-10-12 15:53:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:32,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:32,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:53:32,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:32,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-12 15:53:32,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:53:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:53:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 15:53:32,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:32,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:32,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:32,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:32,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:32,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:32,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:32,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:32,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:33,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:33,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:53:33,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:33,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-12 15:53:33,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:33,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:33,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:33,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:53:33,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:33,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:53:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:33,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:33,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:33,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:53:33,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:33,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:53:33,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:53:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:33,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:53:33,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:33,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 15:53:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:33,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:33,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:33,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:53:33,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:33,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:53:33,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:33,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:53:33,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:53:33,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 15:53:33,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734844438] [2020-10-12 15:53:33,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:33,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:53:33,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592568228] [2020-10-12 15:53:33,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:53:33,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:33,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:53:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:53:33,132 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 13 states. [2020-10-12 15:53:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:33,492 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2020-10-12 15:53:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:53:33,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-12 15:53:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:33,495 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:53:33,496 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:53:33,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:53:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:53:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2020-10-12 15:53:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 15:53:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-12 15:53:33,524 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 58 [2020-10-12 15:53:33,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:33,525 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-12 15:53:33,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:53:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-12 15:53:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 15:53:33,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:33,526 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:33,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:53:33,527 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1456806936, now seen corresponding path program 6 times [2020-10-12 15:53:33,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:33,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346341818] [2020-10-12 15:53:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:33,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:33,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:35,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:35,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:36,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:38,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:38,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:53:38,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:53:38,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:53:38,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:38,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:53:38,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:53:38,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:53:38,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:38,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:38,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:38,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:38,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:38,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:38,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:38,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:38,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:38,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-12 15:53:38,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:38,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:53:38,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:38,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:53:38,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:39,251 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-12 15:53:39,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:53:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:39,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:40,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:53:40,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:41,294 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-12 15:53:41,484 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 31 [2020-10-12 15:53:41,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 15:53:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:41,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:41,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:53:41,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 15:53:41,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346341818] [2020-10-12 15:53:41,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:41,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:53:41,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112128977] [2020-10-12 15:53:41,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:53:41,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:53:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:53:41,907 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 26 states. [2020-10-12 15:53:43,717 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-10-12 15:53:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:44,004 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2020-10-12 15:53:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:53:44,005 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-12 15:53:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:44,006 INFO L225 Difference]: With dead ends: 105 [2020-10-12 15:53:44,006 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:53:44,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:53:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:53:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-12 15:53:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:53:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-12 15:53:44,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 59 [2020-10-12 15:53:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:44,017 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-12 15:53:44,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:53:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-12 15:53:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:53:44,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:44,019 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:44,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:53:44,019 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:44,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1290248328, now seen corresponding path program 7 times [2020-10-12 15:53:44,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:44,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746128730] [2020-10-12 15:53:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:45,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:45,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:49,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:49,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 15:53:49,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:53:49,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 15:53:49,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:49,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:53:49,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:49,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 15:53:49,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:49,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:49,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:49,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:49,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:49,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:53:49,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:49,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:49,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:49,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:49,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:49,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:49,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:49,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:49,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:49,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:53:49,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:49,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-12 15:53:49,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:53:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:53:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:49,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:53:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:49,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:49,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:49,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:49,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:53:49,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:49,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-12 15:53:49,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:49,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:49,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:49,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:53:49,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 15:53:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:50,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:50,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:50,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:53:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:50,699 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-12 15:53:50,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 15:53:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:50,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:50,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:50,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:53:50,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:50,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 15:53:50,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:50,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:53:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 15:53:50,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746128730] [2020-10-12 15:53:50,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:50,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:53:50,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858616355] [2020-10-12 15:53:50,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:53:50,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:50,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:53:50,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:53:50,866 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 27 states. [2020-10-12 15:53:52,021 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-12 15:53:52,357 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-12 15:53:52,914 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-12 15:53:53,603 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-12 15:53:54,385 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 68 [2020-10-12 15:53:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:54,524 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2020-10-12 15:53:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:53:54,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-10-12 15:53:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:54,527 INFO L225 Difference]: With dead ends: 127 [2020-10-12 15:53:54,527 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 15:53:54,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=276, Invalid=2174, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:53:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 15:53:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-10-12 15:53:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 15:53:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-12 15:53:54,540 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 70 [2020-10-12 15:53:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:54,540 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-12 15:53:54,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:53:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-12 15:53:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 15:53:54,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:54,542 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:54,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:53:54,542 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:54,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1069534435, now seen corresponding path program 8 times [2020-10-12 15:53:54,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:54,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650021866] [2020-10-12 15:53:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:54,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:54,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:55,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:55,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:56,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:59,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:59,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 15:53:59,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:53:59,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 15:53:59,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:59,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 15:53:59,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:53:59,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:53:59,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:59,748 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 30 [2020-10-12 15:53:59,888 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 37 [2020-10-12 15:53:59,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:59,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:59,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:59,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:59,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:59,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:59,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:59,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:00,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:00,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:00,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:00,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:00,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-12 15:54:00,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:54:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:54:00,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:00,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:54:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:00,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:00,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:01,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:01,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:54:01,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-12 15:54:01,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:54:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:54:01,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:01,427 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-12 15:54:01,859 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 85 [2020-10-12 15:54:02,338 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2020-10-12 15:54:02,742 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 73 [2020-10-12 15:54:03,739 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2020-10-12 15:54:03,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 15:54:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:03,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:03,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:54:03,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:03,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 15:54:03,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:03,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:54:03,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:03,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:54:03,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:04,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 15:54:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:04,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:04,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:04,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:54:04,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:04,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:54:04,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:04,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:04,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:04,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:04,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 15:54:04,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650021866] [2020-10-12 15:54:04,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:04,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 15:54:04,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795968099] [2020-10-12 15:54:04,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 15:54:04,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:04,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 15:54:04,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:54:04,393 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 30 states. [2020-10-12 15:54:04,986 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 15:54:06,122 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-12 15:54:06,303 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-12 15:54:06,657 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-12 15:54:07,127 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 15:54:07,448 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-10-12 15:54:07,871 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 112 [2020-10-12 15:54:08,576 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 146 [2020-10-12 15:54:08,792 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-12 15:54:09,483 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 99 [2020-10-12 15:54:10,028 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 93 [2020-10-12 15:54:10,359 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2020-10-12 15:54:10,891 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-10-12 15:54:11,489 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-10-12 15:54:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:11,679 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2020-10-12 15:54:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:54:11,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2020-10-12 15:54:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:11,681 INFO L225 Difference]: With dead ends: 114 [2020-10-12 15:54:11,681 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:54:11,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:54:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:54:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-10-12 15:54:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:54:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-10-12 15:54:11,696 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 72 [2020-10-12 15:54:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:11,696 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-10-12 15:54:11,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 15:54:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-10-12 15:54:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 15:54:11,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:11,698 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:54:11,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:54:11,698 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash -875472291, now seen corresponding path program 9 times [2020-10-12 15:54:11,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:11,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922541922] [2020-10-12 15:54:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:11,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:11,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:12,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:13,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:16,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:16,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 15:54:16,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:54:16,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 15:54:16,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:16,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:54:16,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:54:16,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:54:16,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:16,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:16,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:16,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:16,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:16,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:16,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:16,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:16,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:16,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:17,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:17,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:17,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-12 15:54:17,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:54:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:54:17,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:17,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:54:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:17,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:17,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:54:17,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-12 15:54:17,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:54:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:54:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:18,055 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 15:54:18,266 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-12 15:54:18,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 15:54:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:18,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:18,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:54:18,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:18,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-12 15:54:18,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:54:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:18,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:54:18,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:18,772 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-12 15:54:18,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 15:54:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:18,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:18,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:18,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:54:18,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:18,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:54:18,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:18,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:54:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 15:54:18,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922541922] [2020-10-12 15:54:18,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:18,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:54:18,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842714084] [2020-10-12 15:54:18,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:54:18,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:18,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:54:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:54:18,966 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 28 states. [2020-10-12 15:54:21,036 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2020-10-12 15:54:21,313 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-10-12 15:54:22,425 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-12 15:54:22,727 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2020-10-12 15:54:23,122 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2020-10-12 15:54:23,391 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-12 15:54:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:23,512 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2020-10-12 15:54:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:54:23,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-12 15:54:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:23,514 INFO L225 Difference]: With dead ends: 143 [2020-10-12 15:54:23,514 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:54:23,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:54:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:54:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-12 15:54:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:54:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-12 15:54:23,526 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 72 [2020-10-12 15:54:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:23,526 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-12 15:54:23,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:54:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-12 15:54:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 15:54:23,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:23,527 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:54:23,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:54:23,528 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash 583119234, now seen corresponding path program 10 times [2020-10-12 15:54:23,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:23,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645877552] [2020-10-12 15:54:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:23,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:23,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:23,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:24,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:25,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:25,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:26,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:28,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:28,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:28,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 15:54:28,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:54:28,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:54:28,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:28,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 15:54:28,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:54:28,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 15:54:28,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:28,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:28,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:28,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:28,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:28,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:28,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:28,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:28,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:28,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:28,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:29,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:54:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:30,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:54:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:30,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:30,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:54:30,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:30,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-12 15:54:30,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:30,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:54:30,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:30,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:54:30,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:31,081 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-12 15:54:31,289 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-12 15:54:31,775 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-10-12 15:54:33,047 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 73 [2020-10-12 15:54:33,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 15:54:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:33,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:33,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:54:33,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:33,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 15:54:33,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:54:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:54:33,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:33,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 15:54:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:33,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:33,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:33,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:54:33,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:33,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:54:33,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:33,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:33,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:33,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 11 proven. 99 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 15:54:33,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645877552] [2020-10-12 15:54:33,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:33,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:54:33,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75965709] [2020-10-12 15:54:33,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:54:33,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:54:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:54:33,610 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 33 states. [2020-10-12 15:54:34,173 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-12 15:54:35,433 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-12 15:54:35,640 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-10-12 15:54:36,938 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-12 15:54:37,346 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-12 15:54:37,622 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 15:54:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:38,063 INFO L93 Difference]: Finished difference Result 135 states and 177 transitions. [2020-10-12 15:54:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:54:38,065 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-12 15:54:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:38,066 INFO L225 Difference]: With dead ends: 135 [2020-10-12 15:54:38,066 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 15:54:38,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 15:54:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 15:54:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-10-12 15:54:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 15:54:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2020-10-12 15:54:38,082 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 74 [2020-10-12 15:54:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:38,082 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2020-10-12 15:54:38,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 15:54:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2020-10-12 15:54:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 15:54:38,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:38,084 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:54:38,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:54:38,084 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:38,084 INFO L82 PathProgramCache]: Analyzing trace with hash 777181378, now seen corresponding path program 11 times [2020-10-12 15:54:38,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:38,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101769935] [2020-10-12 15:54:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:38,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:38,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:38,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:39,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:41,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:43,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:43,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 15:54:43,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:54:43,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-12 15:54:43,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:43,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 15:54:43,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:54:43,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:54:43,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:44,173 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 60 [2020-10-12 15:54:45,234 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 172 DAG size of output: 64 [2020-10-12 15:54:45,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:45,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:45,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:45,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:45,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:45,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:45,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:45,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:45,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:45,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:45,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:45,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:45,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:45,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:45,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:45,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:45,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:45,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-12 15:54:45,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:45,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:54:45,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:45,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:54:45,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:46,463 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2020-10-12 15:54:46,814 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-12 15:54:47,045 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2020-10-12 15:54:47,626 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 90 [2020-10-12 15:54:48,572 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 105 [2020-10-12 15:54:49,007 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2020-10-12 15:54:49,440 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 15:54:49,766 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-12 15:54:49,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:54:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:49,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:49,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:50,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:54:50,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-12 15:54:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:54:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:54:50,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:50,590 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-12 15:54:50,968 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-12 15:54:51,342 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2020-10-12 15:54:51,742 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-12 15:54:53,022 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 158 DAG size of output: 105 [2020-10-12 15:54:54,126 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 110 [2020-10-12 15:54:55,342 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 163 DAG size of output: 104 [2020-10-12 15:54:56,156 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 98 [2020-10-12 15:54:56,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 15:54:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:56,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:56,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:54:56,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:56,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 15:54:56,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:56,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:54:56,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:56,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:54:56,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:56,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 15:54:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:56,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:56,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:56,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:54:56,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:56,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:54:56,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:56,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:56,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:56,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:56,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:54:56,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101769935] [2020-10-12 15:54:56,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:56,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:54:56,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372904601] [2020-10-12 15:54:56,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:54:56,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:56,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:54:56,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:54:56,875 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 32 states. [2020-10-12 15:54:58,125 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-10-12 15:54:58,533 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-12 15:54:58,980 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2020-10-12 15:55:00,069 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 105 [2020-10-12 15:55:01,577 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 211 DAG size of output: 116 [2020-10-12 15:55:01,942 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-12 15:55:02,632 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-12 15:55:03,687 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-12 15:55:03,888 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-12 15:55:04,140 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-12 15:55:04,747 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 141 [2020-10-12 15:55:05,677 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 168 [2020-10-12 15:55:06,834 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 151 [2020-10-12 15:55:07,244 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-12 15:55:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:07,427 INFO L93 Difference]: Finished difference Result 142 states and 185 transitions. [2020-10-12 15:55:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:55:07,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-12 15:55:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:07,430 INFO L225 Difference]: With dead ends: 142 [2020-10-12 15:55:07,431 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 15:55:07,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 15:55:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 15:55:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-12 15:55:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 15:55:07,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2020-10-12 15:55:07,453 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 74 [2020-10-12 15:55:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:07,454 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2020-10-12 15:55:07,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:55:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2020-10-12 15:55:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 15:55:07,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:07,455 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:07,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:55:07,456 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash -354604377, now seen corresponding path program 12 times [2020-10-12 15:55:07,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:07,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776510356] [2020-10-12 15:55:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:07,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:07,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:07,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:08,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:08,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:09,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:11,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:12,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:12,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 15:55:12,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:55:12,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 15:55:12,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:12,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 15:55:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:55:12,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 15:55:12,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:12,726 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-12 15:55:12,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:12,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:12,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:12,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:12,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:12,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:12,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:12,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:12,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:12,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:12,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:55:12,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:12,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:13,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:13,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:55:13,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:13,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-12 15:55:13,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:13,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:55:13,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:13,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:13,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:13,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:55:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:13,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:14,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:14,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:55:14,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:14,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 15:55:14,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:55:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:55:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:15,488 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 93 [2020-10-12 15:55:16,327 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2020-10-12 15:55:17,133 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 78 [2020-10-12 15:55:17,364 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-12 15:55:17,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 15:55:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:17,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:17,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:17,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:55:17,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:17,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 15:55:17,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:17,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:55:17,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:17,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:55:17,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:17,593 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-12 15:55:18,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 15:55:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:18,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:18,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:18,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:55:18,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:55:18,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:18,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:18,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 101 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:55:18,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776510356] [2020-10-12 15:55:18,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:18,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:55:18,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146026478] [2020-10-12 15:55:18,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:55:18,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:55:18,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:55:18,208 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 32 states. [2020-10-12 15:55:18,681 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-12 15:55:19,126 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 15:55:19,897 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2020-10-12 15:55:20,087 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-12 15:55:20,475 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 15:55:20,896 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-12 15:55:22,162 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 130 DAG size of output: 108 [2020-10-12 15:55:22,729 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 108 [2020-10-12 15:55:23,665 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 129 [2020-10-12 15:55:24,659 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-12 15:55:24,859 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-12 15:55:25,100 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 15:55:25,600 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 114 [2020-10-12 15:55:26,291 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 126 [2020-10-12 15:55:27,080 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 123 [2020-10-12 15:55:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:27,281 INFO L93 Difference]: Finished difference Result 135 states and 173 transitions. [2020-10-12 15:55:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:55:27,284 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 76 [2020-10-12 15:55:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:27,285 INFO L225 Difference]: With dead ends: 135 [2020-10-12 15:55:27,286 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:55:27,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=273, Invalid=2483, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 15:55:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:55:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-12 15:55:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 15:55:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-12 15:55:27,304 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 76 [2020-10-12 15:55:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:27,304 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-12 15:55:27,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:55:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-12 15:55:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 15:55:27,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:27,305 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:27,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:55:27,306 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash -160542233, now seen corresponding path program 13 times [2020-10-12 15:55:27,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:27,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543190336] [2020-10-12 15:55:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:27,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:27,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:29,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:29,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:32,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:32,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 15:55:32,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:55:32,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:55:32,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:55:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:55:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:55:32,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:32,743 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2020-10-12 15:55:33,231 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2020-10-12 15:55:33,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:33,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:33,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:33,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:33,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:33,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:33,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:33,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:33,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:33,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:33,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:33,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:33,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:33,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:33,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:55:33,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:55:33,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-12 15:55:33,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:55:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:33,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:34,291 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-12 15:55:34,517 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-12 15:55:34,880 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-12 15:55:35,582 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 75 [2020-10-12 15:55:36,816 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 231 DAG size of output: 85 [2020-10-12 15:55:37,313 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 50 [2020-10-12 15:55:37,714 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-12 15:55:38,113 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-12 15:55:38,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:55:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:38,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:38,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:38,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:55:38,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:38,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-12 15:55:38,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:55:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:55:38,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:38,749 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-12 15:55:39,013 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-12 15:55:39,637 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-12 15:55:40,151 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 52 [2020-10-12 15:55:40,995 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 66 [2020-10-12 15:55:41,984 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 96 [2020-10-12 15:55:43,088 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 106 [2020-10-12 15:55:43,813 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2020-10-12 15:55:44,485 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-10-12 15:55:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 15:55:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:44,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:44,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:44,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:55:44,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:44,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:55:44,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:44,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:44,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:55:44,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:44,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:44,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 15:55:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:44,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:44,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:55:44,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:44,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:55:44,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:55:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:44,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 5 proven. 96 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-12 15:55:44,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543190336] [2020-10-12 15:55:44,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:44,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:55:44,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553563563] [2020-10-12 15:55:44,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:55:44,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:55:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:55:44,559 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 29 states. [2020-10-12 15:55:45,698 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-12 15:55:45,960 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-12 15:55:46,321 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-12 15:55:47,331 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 132 [2020-10-12 15:55:48,874 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 167 DAG size of output: 150 [2020-10-12 15:55:49,192 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-12 15:55:49,622 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 15:55:50,109 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-12 15:55:50,515 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 15:55:50,764 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-12 15:55:51,033 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-12 15:55:51,385 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-12 15:55:51,841 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2020-10-12 15:55:52,506 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-10-12 15:55:53,445 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 185 [2020-10-12 15:55:54,003 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 88 [2020-10-12 15:55:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:54,157 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2020-10-12 15:55:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:55:54,158 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2020-10-12 15:55:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:54,159 INFO L225 Difference]: With dead ends: 134 [2020-10-12 15:55:54,159 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 15:55:54,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=192, Invalid=2258, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:55:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 15:55:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2020-10-12 15:55:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 15:55:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-10-12 15:55:54,182 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 76 [2020-10-12 15:55:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:54,182 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-10-12 15:55:54,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 15:55:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-10-12 15:55:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 15:55:54,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:54,184 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:54,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:55:54,184 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash 630199756, now seen corresponding path program 14 times [2020-10-12 15:55:54,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:54,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727032520] [2020-10-12 15:55:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:54,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:54,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:55,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:57,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:57,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:59,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:59,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 15:55:59,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:55:59,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 15:55:59,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:59,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 15:55:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:55:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:55:59,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:59,443 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-12 15:55:59,576 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-12 15:55:59,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:55:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:59,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:59,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:59,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:55:59,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:59,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:55:59,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:59,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:55:59,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:59,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:55:59,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:59,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:55:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:59,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:59,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:59,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:55:59,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:59,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-12 15:55:59,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:59,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:55:59,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:55:59,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:55:59,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:00,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:56:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:00,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:00,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:00,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:56:00,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:00,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-12 15:56:00,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:56:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:56:00,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:01,626 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-12 15:56:01,829 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-12 15:56:02,736 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 51 [2020-10-12 15:56:04,422 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 229 DAG size of output: 76 [2020-10-12 15:56:07,185 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 380 DAG size of output: 102 [2020-10-12 15:56:10,068 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 375 DAG size of output: 96 [2020-10-12 15:56:12,823 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 358 DAG size of output: 92 [2020-10-12 15:56:13,615 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 95 [2020-10-12 15:56:13,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 15:56:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:13,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:13,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:13,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 15:56:13,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-12 15:56:13,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:56:13,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:13,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:56:13,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:14,206 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-12 15:56:14,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 15:56:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:14,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:14,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:14,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 15:56:14,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:14,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:56:14,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:14,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 25 proven. 121 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 15:56:14,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727032520] [2020-10-12 15:56:14,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:14,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:56:14,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978298079] [2020-10-12 15:56:14,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:56:14,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:56:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:56:14,580 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 33 states. [2020-10-12 15:56:16,026 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-12 15:56:16,232 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-12 15:56:16,645 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-12 15:56:17,197 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-12 15:56:17,675 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 113 [2020-10-12 15:56:18,224 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 108 [2020-10-12 15:56:19,439 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 147 DAG size of output: 128 [2020-10-12 15:56:20,243 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2020-10-12 15:56:20,441 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-12 15:56:20,729 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-12 15:56:20,941 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:56:21,802 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 144 [2020-10-12 15:56:22,962 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 173 DAG size of output: 163 [2020-10-12 15:56:23,978 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 142 [2020-10-12 15:56:24,891 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 144 [2020-10-12 15:56:26,170 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 206 DAG size of output: 160 [2020-10-12 15:56:26,514 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2020-10-12 15:56:27,537 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 135 [2020-10-12 15:56:27,956 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82