/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/forester-heap/sll-simple-white-blue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:38:08,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:38:08,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:38:08,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:38:08,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:38:08,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:38:08,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:38:08,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:38:08,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:38:08,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:38:08,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:38:08,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:38:08,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:38:08,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:38:08,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:38:08,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:38:08,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:38:08,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:38:08,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:38:08,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:38:08,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:38:08,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:38:08,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:38:08,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:38:08,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:38:08,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:38:08,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:38:08,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:38:08,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:38:08,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:38:08,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:38:08,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:38:08,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:38:08,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:38:08,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:38:08,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:38:08,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:38:08,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:38:08,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:38:08,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:38:08,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:38:08,909 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 15:38:08,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:38:08,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:38:08,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:38:08,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:38:08,934 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:38:08,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:38:08,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:38:08,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:38:08,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:38:08,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:38:08,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:38:08,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:38:08,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:38:08,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:38:08,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:38:08,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:38:08,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:38:08,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:38:08,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:38:08,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:38:08,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:38:08,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:38:08,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:38:08,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:38:08,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:38:08,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:38:08,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:38:08,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:38:08,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:38:08,939 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 15:38:09,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:38:09,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:38:09,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:38:09,278 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:38:09,280 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:38:09,280 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-simple-white-blue-1.i [2020-10-12 15:38:09,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/522b19062/cc5872fcc425456196d5739e1e6df29e/FLAG0fbb6d1c8 [2020-10-12 15:38:09,924 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:38:09,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-simple-white-blue-1.i [2020-10-12 15:38:09,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/522b19062/cc5872fcc425456196d5739e1e6df29e/FLAG0fbb6d1c8 [2020-10-12 15:38:10,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/522b19062/cc5872fcc425456196d5739e1e6df29e [2020-10-12 15:38:10,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:38:10,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:38:10,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:10,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:38:10,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:38:10,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c9761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10, skipping insertion in model container [2020-10-12 15:38:10,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:38:10,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:38:10,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:10,693 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:38:10,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:10,805 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:38:10,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10 WrapperNode [2020-10-12 15:38:10,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:10,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:38:10,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:38:10,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:38:10,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (1/1) ... [2020-10-12 15:38:10,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:38:10,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:38:10,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:38:10,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:38:10,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (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 15:38:10,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:38:10,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:38:10,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:38:10,939 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:38:10,939 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:38:10,939 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:38:10,939 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:38:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:38:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:38:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:38:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:38:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:38:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:38:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:38:10,942 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:38:10,942 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:38:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:38:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:38:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:38:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:38:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:38:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:38:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:38:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:38:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:38:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:38:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:38:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:38:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:38:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:38:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:38:10,948 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:38:10,949 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:38:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:38:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:38:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:38:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:38:10,950 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:38:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:38:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:38:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:38:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:38:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:38:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:38:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:38:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:38:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:38:10,955 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:38:10,955 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:38:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:38:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:38:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:38:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:38:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:38:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:38:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:38:10,958 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:38:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:38:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:38:11,476 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:38:11,476 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-12 15:38:11,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:11 BoogieIcfgContainer [2020-10-12 15:38:11,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:38:11,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:38:11,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:38:11,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:38:11,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:38:10" (1/3) ... [2020-10-12 15:38:11,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4884f022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:11, skipping insertion in model container [2020-10-12 15:38:11,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:10" (2/3) ... [2020-10-12 15:38:11,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4884f022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:11, skipping insertion in model container [2020-10-12 15:38:11,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:11" (3/3) ... [2020-10-12 15:38:11,490 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2020-10-12 15:38:11,500 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:38:11,508 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:38:11,522 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:38:11,547 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:38:11,547 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:38:11,547 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:38:11,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:38:11,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:38:11,548 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:38:11,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:38:11,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:38:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-12 15:38:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 15:38:11,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:11,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:11,575 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1759752198, now seen corresponding path program 1 times [2020-10-12 15:38:11,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:11,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146912659] [2020-10-12 15:38:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:11,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:11,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:11,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:12,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:12,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:38:12,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:12,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-12 15:38:12,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:38:12,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:38:12,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:12,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:12,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:12,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:12,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:12,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:38:12,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:12,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:12,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:12,382 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 15:38:12,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146912659] [2020-10-12 15:38:12,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:12,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 15:38:12,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692638921] [2020-10-12 15:38:12,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:12,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:12,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:12,412 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2020-10-12 15:38:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:12,780 INFO L93 Difference]: Finished difference Result 93 states and 147 transitions. [2020-10-12 15:38:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:38:12,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-12 15:38:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:12,795 INFO L225 Difference]: With dead ends: 93 [2020-10-12 15:38:12,795 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:38:12,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:38:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-10-12 15:38:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 15:38:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-10-12 15:38:12,845 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 15 [2020-10-12 15:38:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:12,846 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-10-12 15:38:12,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:38:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-10-12 15:38:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:38:12,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:12,848 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:12,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:38:12,848 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1010508073, now seen corresponding path program 1 times [2020-10-12 15:38:12,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:12,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065150890] [2020-10-12 15:38:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:12,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:12,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:12,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:13,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:13,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:38:13,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:13,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-12 15:38:13,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:38:13,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:13,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:13,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:13,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:13,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:13,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:13,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:13,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:13,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:13,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065150890] [2020-10-12 15:38:13,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:13,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:38:13,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547642290] [2020-10-12 15:38:13,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:13,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:13,448 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 8 states. [2020-10-12 15:38:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:13,779 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-12 15:38:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:38:13,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-12 15:38:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:13,781 INFO L225 Difference]: With dead ends: 68 [2020-10-12 15:38:13,781 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:38:13,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:38:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2020-10-12 15:38:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 15:38:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-12 15:38:13,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2020-10-12 15:38:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:13,790 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-12 15:38:13,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:38:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-12 15:38:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:38:13,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:13,792 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:13,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:38:13,792 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:13,793 INFO L82 PathProgramCache]: Analyzing trace with hash -59987457, now seen corresponding path program 1 times [2020-10-12 15:38:13,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:13,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032671576] [2020-10-12 15:38:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:13,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:13,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:13,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:38:13,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:13,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-12 15:38:13,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:38:13,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:13,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:38:13,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:14,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:14,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:14,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:14,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:14,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:38:14,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:14,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:14,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:14,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032671576] [2020-10-12 15:38:14,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:14,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:38:14,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980060849] [2020-10-12 15:38:14,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:38:14,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:38:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:14,254 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-10-12 15:38:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:14,636 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-10-12 15:38:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:38:14,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-12 15:38:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:14,638 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:38:14,638 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:38:14,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:38:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:38:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-10-12 15:38:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:38:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-12 15:38:14,654 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 19 [2020-10-12 15:38:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:14,655 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-12 15:38:14,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:38:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-12 15:38:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:38:14,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:14,657 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] [2020-10-12 15:38:14,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:38:14,658 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:14,658 INFO L82 PathProgramCache]: Analyzing trace with hash -687403823, now seen corresponding path program 1 times [2020-10-12 15:38:14,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:14,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48749822] [2020-10-12 15:38:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:14,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:15,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:15,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:38:15,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-12 15:38:15,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:15,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:38:15,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:38:15,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:38:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:15,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:15,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:15,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:15,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:15,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:15,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:15,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:15,210 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 15:38:15,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48749822] [2020-10-12 15:38:15,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:15,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 15:38:15,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868598741] [2020-10-12 15:38:15,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:38:15,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:15,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:38:15,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:15,213 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 9 states. [2020-10-12 15:38:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:15,511 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-10-12 15:38:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:38:15,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-12 15:38:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:15,513 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:38:15,513 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:38:15,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:38:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-12 15:38:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:38:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-12 15:38:15,523 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 20 [2020-10-12 15:38:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:15,524 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-12 15:38:15,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:38:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-12 15:38:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:38:15,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:15,525 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:15,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:38:15,526 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1938777486, now seen corresponding path program 2 times [2020-10-12 15:38:15,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:15,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734677039] [2020-10-12 15:38:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:15,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:15,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:15,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:38:15,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:15,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 15:38:15,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:38:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:38:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:38:15,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:15,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:15,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:15,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:15,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:15,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:15,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:15,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:38:15,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734677039] [2020-10-12 15:38:15,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:15,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:38:15,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837314705] [2020-10-12 15:38:15,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:38:15,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:15,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:38:15,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:38:15,672 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2020-10-12 15:38:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:15,781 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-12 15:38:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:38:15,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-12 15:38:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:15,783 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:38:15,783 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:38:15,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:38:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-12 15:38:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:38:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-12 15:38:15,791 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 21 [2020-10-12 15:38:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:15,791 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-12 15:38:15,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:38:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-12 15:38:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:38:15,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:15,793 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:15,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:38:15,794 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1380738630, now seen corresponding path program 2 times [2020-10-12 15:38:15,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:15,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324528381] [2020-10-12 15:38:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:15,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:16,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:16,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:38:16,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:16,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-12 15:38:16,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:16,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:38:16,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:16,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:38:16,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:16,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:16,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:16,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:16,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:16,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:16,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:16,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324528381] [2020-10-12 15:38:16,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:16,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:38:16,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195855240] [2020-10-12 15:38:16,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:38:16,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:38:16,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:16,214 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 10 states. [2020-10-12 15:38:16,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:16,676 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-12 15:38:16,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:38:16,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-12 15:38:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:16,678 INFO L225 Difference]: With dead ends: 66 [2020-10-12 15:38:16,678 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 15:38:16,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:38:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 15:38:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2020-10-12 15:38:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:38:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-12 15:38:16,685 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2020-10-12 15:38:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:16,686 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-12 15:38:16,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:38:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-12 15:38:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:16,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:16,687 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:16,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:38:16,688 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1961949386, now seen corresponding path program 1 times [2020-10-12 15:38:16,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:16,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392328649] [2020-10-12 15:38:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:16,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:16,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:16,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:16,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-12 15:38:16,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:38:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:38:16,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:16,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:16,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:16,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:16,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:16,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:16,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:16,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:16,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392328649] [2020-10-12 15:38:16,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:16,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:38:16,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585168232] [2020-10-12 15:38:16,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:16,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:16,845 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 7 states. [2020-10-12 15:38:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:16,997 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-12 15:38:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:38:16,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 15:38:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:16,999 INFO L225 Difference]: With dead ends: 63 [2020-10-12 15:38:16,999 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 15:38:17,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 15:38:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-10-12 15:38:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:38:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-12 15:38:17,005 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2020-10-12 15:38:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:17,005 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-12 15:38:17,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-12 15:38:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:17,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:17,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:17,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:38:17,007 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:17,007 INFO L82 PathProgramCache]: Analyzing trace with hash -361877940, now seen corresponding path program 1 times [2020-10-12 15:38:17,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:17,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369081908] [2020-10-12 15:38:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:17,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:17,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:17,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:17,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 15:38:17,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:38:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:38:17,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:17,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:17,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:17,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:17,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:17,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:38:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:17,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369081908] [2020-10-12 15:38:17,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:17,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:38:17,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537453661] [2020-10-12 15:38:17,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:38:17,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:17,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:38:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:17,384 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2020-10-12 15:38:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:17,885 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-12 15:38:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:38:17,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-12 15:38:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:17,887 INFO L225 Difference]: With dead ends: 54 [2020-10-12 15:38:17,887 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:38:17,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:38:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:38:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-12 15:38:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:38:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-12 15:38:17,893 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2020-10-12 15:38:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:17,894 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-12 15:38:17,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:38:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-12 15:38:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:38:17,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:17,895 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:17,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:38:17,896 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 375654034, now seen corresponding path program 1 times [2020-10-12 15:38:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:17,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256009318] [2020-10-12 15:38:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:17,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:18,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:18,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:38:18,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:18,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-12 15:38:18,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:18,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:38:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:38:18,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:18,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:18,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:18,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:18,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:18,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:38:18,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:18,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:18,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256009318] [2020-10-12 15:38:18,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:18,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:38:18,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035794954] [2020-10-12 15:38:18,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:38:18,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:18,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:38:18,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:18,678 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 11 states. [2020-10-12 15:38:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:19,390 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-12 15:38:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:38:19,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-12 15:38:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:19,394 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:38:19,394 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 15:38:19,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:38:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 15:38:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-10-12 15:38:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 15:38:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-12 15:38:19,407 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 23 [2020-10-12 15:38:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:19,408 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-12 15:38:19,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:38:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-12 15:38:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:38:19,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:19,414 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:19,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:38:19,414 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:19,415 INFO L82 PathProgramCache]: Analyzing trace with hash -319739169, now seen corresponding path program 2 times [2020-10-12 15:38:19,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:19,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753310130] [2020-10-12 15:38:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:19,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:19,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:38:19,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:19,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-12 15:38:19,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:19,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:38:19,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:19,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:38:19,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:19,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:19,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:19,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:19,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:19,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:19,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:19,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:19,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:19,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753310130] [2020-10-12 15:38:19,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:19,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:38:19,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718819237] [2020-10-12 15:38:19,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:38:19,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:19,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:38:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:38:19,800 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 10 states. [2020-10-12 15:38:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:20,475 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-12 15:38:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:38:20,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 15:38:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:20,476 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:38:20,476 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:38:20,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:38:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:38:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2020-10-12 15:38:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 15:38:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-12 15:38:20,490 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 25 [2020-10-12 15:38:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:20,491 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-12 15:38:20,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:38:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-12 15:38:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:38:20,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:20,493 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:20,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:38:20,493 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -421093171, now seen corresponding path program 2 times [2020-10-12 15:38:20,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:20,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455674908] [2020-10-12 15:38:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:20,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:20,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:20,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:38:20,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:20,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-12 15:38:20,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:20,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:38:20,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:21,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:21,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:21,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:21,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:21,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:21,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:21,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:21,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:21,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:21,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:21,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:21,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455674908] [2020-10-12 15:38:21,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:21,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:21,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971053943] [2020-10-12 15:38:21,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:21,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:21,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:21,461 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 12 states. [2020-10-12 15:38:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:21,999 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2020-10-12 15:38:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:38:21,999 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-12 15:38:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:22,000 INFO L225 Difference]: With dead ends: 102 [2020-10-12 15:38:22,000 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 15:38:22,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:38:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 15:38:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-12 15:38:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:38:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-10-12 15:38:22,009 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 25 [2020-10-12 15:38:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:22,009 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-10-12 15:38:22,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-10-12 15:38:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 15:38:22,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:22,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:22,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:38:22,011 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:22,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1557388071, now seen corresponding path program 1 times [2020-10-12 15:38:22,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:22,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714491294] [2020-10-12 15:38:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:22,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:22,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:22,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:22,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:38:22,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:22,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-12 15:38:22,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:38:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:38:22,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:22,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:22,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:22,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:22,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:22,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:22,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:22,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:22,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:22,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:22,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714491294] [2020-10-12 15:38:22,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:22,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:38:22,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877610162] [2020-10-12 15:38:22,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:38:22,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:38:22,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:22,632 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 11 states. [2020-10-12 15:38:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:23,328 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2020-10-12 15:38:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:38:23,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-12 15:38:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:23,334 INFO L225 Difference]: With dead ends: 106 [2020-10-12 15:38:23,334 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:38:23,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:38:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:38:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2020-10-12 15:38:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 15:38:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2020-10-12 15:38:23,350 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 26 [2020-10-12 15:38:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:23,350 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2020-10-12 15:38:23,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:38:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2020-10-12 15:38:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:38:23,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:23,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:23,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:38:23,352 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:23,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1226986052, now seen corresponding path program 1 times [2020-10-12 15:38:23,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:23,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610967478] [2020-10-12 15:38:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:23,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:23,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:23,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:38:23,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-12 15:38:23,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:38:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:23,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:38:23,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:23,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:23,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:23,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:23,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:23,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:23,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:23,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:23,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610967478] [2020-10-12 15:38:23,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:23,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:38:23,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963947741] [2020-10-12 15:38:23,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:38:23,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:38:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:23,696 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 11 states. [2020-10-12 15:38:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:24,053 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2020-10-12 15:38:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:38:24,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-12 15:38:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:24,056 INFO L225 Difference]: With dead ends: 106 [2020-10-12 15:38:24,056 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 15:38:24,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 15:38:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-10-12 15:38:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 15:38:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-10-12 15:38:24,066 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 27 [2020-10-12 15:38:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:24,066 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-10-12 15:38:24,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:38:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-10-12 15:38:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:38:24,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:24,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:24,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:38:24,068 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1489624486, now seen corresponding path program 3 times [2020-10-12 15:38:24,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:24,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95660556] [2020-10-12 15:38:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:24,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:24,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:38:24,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-12 15:38:24,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:24,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:24,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:38:24,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:24,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:24,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:24,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:24,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:24,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:24,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:24,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:24,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:24,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95660556] [2020-10-12 15:38:24,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:24,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:24,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923396586] [2020-10-12 15:38:24,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:24,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:24,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:24,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:24,560 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 12 states. [2020-10-12 15:38:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:25,345 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-10-12 15:38:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:38:25,346 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-12 15:38:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:25,347 INFO L225 Difference]: With dead ends: 110 [2020-10-12 15:38:25,347 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 15:38:25,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:38:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 15:38:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-10-12 15:38:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 15:38:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2020-10-12 15:38:25,366 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 27 [2020-10-12 15:38:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:25,366 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2020-10-12 15:38:25,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2020-10-12 15:38:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:38:25,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:25,367 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:25,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:38:25,368 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1590978488, now seen corresponding path program 3 times [2020-10-12 15:38:25,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:25,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037723344] [2020-10-12 15:38:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:25,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:25,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:26,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:38:26,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:26,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-12 15:38:26,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:38:26,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:26,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:26,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:26,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:26,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:26,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:26,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:26,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:26,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037723344] [2020-10-12 15:38:26,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:26,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:26,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583535156] [2020-10-12 15:38:26,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:26,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:26,675 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand 13 states. [2020-10-12 15:38:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:27,354 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2020-10-12 15:38:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:38:27,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-12 15:38:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:27,356 INFO L225 Difference]: With dead ends: 111 [2020-10-12 15:38:27,356 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 15:38:27,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:38:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 15:38:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 76. [2020-10-12 15:38:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:38:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-10-12 15:38:27,378 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 27 [2020-10-12 15:38:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:27,378 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-10-12 15:38:27,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-10-12 15:38:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:38:27,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:27,381 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:27,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:38:27,383 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 830872766, now seen corresponding path program 2 times [2020-10-12 15:38:27,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:27,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586475229] [2020-10-12 15:38:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:27,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:27,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:28,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:38:28,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:28,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-12 15:38:28,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:28,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:28,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:28,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:38:28,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:28,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:28,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:28,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:28,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:28,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:28,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:28,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:28,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:28,685 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 15:38:28,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586475229] [2020-10-12 15:38:28,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:28,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:28,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956353608] [2020-10-12 15:38:28,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:28,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:28,689 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 13 states. [2020-10-12 15:38:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:29,650 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2020-10-12 15:38:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:38:29,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-12 15:38:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:29,652 INFO L225 Difference]: With dead ends: 115 [2020-10-12 15:38:29,653 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 15:38:29,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:38:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 15:38:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2020-10-12 15:38:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 15:38:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2020-10-12 15:38:29,667 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 28 [2020-10-12 15:38:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:29,668 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2020-10-12 15:38:29,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2020-10-12 15:38:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:29,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:29,669 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:29,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:38:29,669 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash -809428639, now seen corresponding path program 2 times [2020-10-12 15:38:29,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:29,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014128725] [2020-10-12 15:38:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:29,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:29,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:29,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:29,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-12 15:38:29,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:29,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:38:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:38:29,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:30,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:30,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:30,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:30,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:30,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:30,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:38:30,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:30,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014128725] [2020-10-12 15:38:30,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:30,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:38:30,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925702707] [2020-10-12 15:38:30,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:38:30,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:38:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:30,114 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 11 states. [2020-10-12 15:38:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:30,719 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2020-10-12 15:38:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:38:30,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-12 15:38:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:30,721 INFO L225 Difference]: With dead ends: 148 [2020-10-12 15:38:30,721 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 15:38:30,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:38:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 15:38:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-12 15:38:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 15:38:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2020-10-12 15:38:30,746 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 29 [2020-10-12 15:38:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:30,747 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2020-10-12 15:38:30,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:38:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2020-10-12 15:38:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:30,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:30,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:30,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:38:30,749 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash -205344137, now seen corresponding path program 3 times [2020-10-12 15:38:30,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:30,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426477556] [2020-10-12 15:38:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:30,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:31,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:31,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:31,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:31,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-12 15:38:31,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:38:31,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:31,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:31,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:31,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:31,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:31,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:31,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:31,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:31,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:31,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:31,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:31,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426477556] [2020-10-12 15:38:31,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:31,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:31,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581198053] [2020-10-12 15:38:31,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:31,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:31,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:31,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:31,712 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand 13 states. [2020-10-12 15:38:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:32,379 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2020-10-12 15:38:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:38:32,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 15:38:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:32,381 INFO L225 Difference]: With dead ends: 126 [2020-10-12 15:38:32,381 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 15:38:32,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:38:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 15:38:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2020-10-12 15:38:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 15:38:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2020-10-12 15:38:32,397 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 29 [2020-10-12 15:38:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:32,397 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2020-10-12 15:38:32,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2020-10-12 15:38:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:38:32,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:32,398 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:32,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:38:32,399 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:32,399 INFO L82 PathProgramCache]: Analyzing trace with hash -467982571, now seen corresponding path program 4 times [2020-10-12 15:38:32,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:32,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215293275] [2020-10-12 15:38:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:32,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:32,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:32,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:38:32,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:32,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-12 15:38:32,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:32,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:32,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:32,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:38:32,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:33,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:33,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:33,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:33,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:33,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:33,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:33,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:33,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:33,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:33,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215293275] [2020-10-12 15:38:33,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:33,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:33,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35195567] [2020-10-12 15:38:33,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:33,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:33,250 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand 13 states. [2020-10-12 15:38:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:34,605 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2020-10-12 15:38:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:38:34,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 15:38:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:34,607 INFO L225 Difference]: With dead ends: 156 [2020-10-12 15:38:34,607 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 15:38:34,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:38:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 15:38:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 103. [2020-10-12 15:38:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 15:38:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2020-10-12 15:38:34,620 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 29 [2020-10-12 15:38:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:34,620 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2020-10-12 15:38:34,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2020-10-12 15:38:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:38:34,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:34,621 INFO L422 BasicCegarLoop]: trace histogram [3, 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 15:38:34,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:38:34,622 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:34,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:34,622 INFO L82 PathProgramCache]: Analyzing trace with hash -507692549, now seen corresponding path program 4 times [2020-10-12 15:38:34,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:34,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437864919] [2020-10-12 15:38:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:34,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:35,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:35,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:38:35,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:35,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-12 15:38:35,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:35,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:38:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:35,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:35,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:35,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:35,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:35,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:35,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:35,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437864919] [2020-10-12 15:38:35,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:35,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:35,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510445096] [2020-10-12 15:38:35,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:35,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:35,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:35,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:35,913 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand 12 states. [2020-10-12 15:38:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:36,396 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-10-12 15:38:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:38:36,397 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:38:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:36,398 INFO L225 Difference]: With dead ends: 134 [2020-10-12 15:38:36,398 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 15:38:36,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:38:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 15:38:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2020-10-12 15:38:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 15:38:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2020-10-12 15:38:36,417 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 30 [2020-10-12 15:38:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:36,417 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2020-10-12 15:38:36,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2020-10-12 15:38:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:38:36,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:36,418 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:36,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:38:36,418 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1782901743, now seen corresponding path program 5 times [2020-10-12 15:38:36,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:36,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155533313] [2020-10-12 15:38:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:36,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:36,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:36,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:38:36,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-12 15:38:36,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:38:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:38:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:36,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:36,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:36,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:36,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:36,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:36,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:36,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:36,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155533313] [2020-10-12 15:38:36,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:36,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:38:36,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486313540] [2020-10-12 15:38:36,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:38:36,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:38:36,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:36,865 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand 12 states. [2020-10-12 15:38:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:37,766 INFO L93 Difference]: Finished difference Result 143 states and 173 transitions. [2020-10-12 15:38:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:38:37,767 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:38:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:37,768 INFO L225 Difference]: With dead ends: 143 [2020-10-12 15:38:37,768 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 15:38:37,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:38:37,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 15:38:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-10-12 15:38:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 15:38:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2020-10-12 15:38:37,781 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 30 [2020-10-12 15:38:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:37,781 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2020-10-12 15:38:37,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:38:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2020-10-12 15:38:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:38:37,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:37,782 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:37,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:38:37,782 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:37,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1857966237, now seen corresponding path program 3 times [2020-10-12 15:38:37,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:37,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234434486] [2020-10-12 15:38:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:37,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:38,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:38,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:38:38,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:38,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-10-12 15:38:38,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:38:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:38:38,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:39,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:39,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:39,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:39,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:39,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:39,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:39,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:39,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:39,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:39,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:39,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234434486] [2020-10-12 15:38:39,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:39,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:38:39,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748240270] [2020-10-12 15:38:39,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:38:39,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:38:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:38:39,203 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand 14 states. [2020-10-12 15:38:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:40,114 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2020-10-12 15:38:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:38:40,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-12 15:38:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:40,118 INFO L225 Difference]: With dead ends: 188 [2020-10-12 15:38:40,118 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 15:38:40,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:38:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 15:38:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 120. [2020-10-12 15:38:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 15:38:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 149 transitions. [2020-10-12 15:38:40,131 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 149 transitions. Word has length 30 [2020-10-12 15:38:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:40,132 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 149 transitions. [2020-10-12 15:38:40,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:38:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 149 transitions. [2020-10-12 15:38:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:38:40,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:40,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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 15:38:40,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:38:40,133 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash 652103469, now seen corresponding path program 4 times [2020-10-12 15:38:40,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:40,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913961411] [2020-10-12 15:38:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:40,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:40,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:40,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:40,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:38:40,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-12 15:38:40,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:38:40,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:41,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:41,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:41,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:41,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:41,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:41,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:41,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:41,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913961411] [2020-10-12 15:38:41,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:41,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:41,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68168929] [2020-10-12 15:38:41,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:41,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:41,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:41,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:41,039 INFO L87 Difference]: Start difference. First operand 120 states and 149 transitions. Second operand 13 states. [2020-10-12 15:38:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:42,170 INFO L93 Difference]: Finished difference Result 167 states and 204 transitions. [2020-10-12 15:38:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:38:42,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-12 15:38:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:42,171 INFO L225 Difference]: With dead ends: 167 [2020-10-12 15:38:42,171 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 15:38:42,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:38:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 15:38:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2020-10-12 15:38:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 15:38:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2020-10-12 15:38:42,187 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 31 [2020-10-12 15:38:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:42,188 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2020-10-12 15:38:42,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2020-10-12 15:38:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:38:42,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:42,188 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:42,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:38:42,189 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1954974606, now seen corresponding path program 5 times [2020-10-12 15:38:42,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:42,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466294045] [2020-10-12 15:38:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:42,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:42,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:42,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:38:42,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:42,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-12 15:38:42,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:38:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:38:42,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:43,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:43,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:43,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:43,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:43,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:43,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466294045] [2020-10-12 15:38:43,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:43,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:38:43,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448583146] [2020-10-12 15:38:43,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:38:43,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:38:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:38:43,238 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand 14 states. [2020-10-12 15:38:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:44,242 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2020-10-12 15:38:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:38:44,243 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-12 15:38:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:44,244 INFO L225 Difference]: With dead ends: 154 [2020-10-12 15:38:44,244 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 15:38:44,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:38:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 15:38:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 120. [2020-10-12 15:38:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 15:38:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2020-10-12 15:38:44,260 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 31 [2020-10-12 15:38:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:44,261 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2020-10-12 15:38:44,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:38:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2020-10-12 15:38:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:38:44,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:44,262 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:44,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:38:44,262 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2077354256, now seen corresponding path program 6 times [2020-10-12 15:38:44,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:44,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83095331] [2020-10-12 15:38:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:44,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:44,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:44,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:38:44,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:44,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-12 15:38:44,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:44,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:38:44,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:44,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:38:44,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:44,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:45,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:45,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:45,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:45,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:45,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:45,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:45,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:45,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83095331] [2020-10-12 15:38:45,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:45,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:38:45,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094502445] [2020-10-12 15:38:45,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:38:45,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:38:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:38:45,013 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand 14 states. [2020-10-12 15:38:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:46,480 INFO L93 Difference]: Finished difference Result 165 states and 202 transitions. [2020-10-12 15:38:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:38:46,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-12 15:38:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:46,482 INFO L225 Difference]: With dead ends: 165 [2020-10-12 15:38:46,482 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 15:38:46,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:38:46,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 15:38:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2020-10-12 15:38:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 15:38:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2020-10-12 15:38:46,499 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 31 [2020-10-12 15:38:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:46,500 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2020-10-12 15:38:46,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:38:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2020-10-12 15:38:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:46,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:46,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:46,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:38:46,501 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1058106912, now seen corresponding path program 6 times [2020-10-12 15:38:46,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:46,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566837217] [2020-10-12 15:38:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:46,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:46,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:46,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:46,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:46,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:46,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-12 15:38:46,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:38:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:38:46,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:47,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:47,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:47,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:47,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:47,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:47,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:47,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:47,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:47,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:47,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:47,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566837217] [2020-10-12 15:38:47,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:47,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:38:47,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632804182] [2020-10-12 15:38:47,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:38:47,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:47,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:38:47,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:38:47,452 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand 15 states. [2020-10-12 15:38:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:48,381 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2020-10-12 15:38:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:38:48,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-12 15:38:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:48,384 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:38:48,384 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 15:38:48,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:38:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 15:38:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-12 15:38:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 15:38:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2020-10-12 15:38:48,401 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 32 [2020-10-12 15:38:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:48,401 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2020-10-12 15:38:48,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:38:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2020-10-12 15:38:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:48,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:48,402 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:48,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:38:48,403 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1355697452, now seen corresponding path program 1 times [2020-10-12 15:38:48,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:48,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411618367] [2020-10-12 15:38:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:48,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:48,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:48,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-12 15:38:48,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:48,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:48,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:48,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:38:48,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:48,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:48,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:48,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:48,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:48,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:48,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:48,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:48,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:48,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:48,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411618367] [2020-10-12 15:38:48,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:48,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:48,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901450391] [2020-10-12 15:38:48,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:48,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:48,898 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand 13 states. [2020-10-12 15:38:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:49,506 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-12 15:38:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:38:49,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 15:38:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:49,509 INFO L225 Difference]: With dead ends: 146 [2020-10-12 15:38:49,509 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 15:38:49,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:38:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 15:38:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2020-10-12 15:38:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 15:38:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2020-10-12 15:38:49,525 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 32 [2020-10-12 15:38:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:49,525 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2020-10-12 15:38:49,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2020-10-12 15:38:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:49,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:49,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:49,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:38:49,526 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:49,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1088337760, now seen corresponding path program 7 times [2020-10-12 15:38:49,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:49,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399562728] [2020-10-12 15:38:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:49,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:49,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:49,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-12 15:38:49,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:38:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:38:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:50,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:50,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:50,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:50,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399562728] [2020-10-12 15:38:50,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:50,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:38:50,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235797330] [2020-10-12 15:38:50,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:38:50,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:50,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:38:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:38:50,118 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand 13 states. [2020-10-12 15:38:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:51,209 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2020-10-12 15:38:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:38:51,210 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 15:38:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:51,211 INFO L225 Difference]: With dead ends: 144 [2020-10-12 15:38:51,211 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 15:38:51,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:38:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 15:38:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2020-10-12 15:38:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 15:38:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-10-12 15:38:51,232 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 32 [2020-10-12 15:38:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:51,232 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-10-12 15:38:51,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:38:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-10-12 15:38:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:51,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:51,233 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:51,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:38:51,233 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -186871434, now seen corresponding path program 7 times [2020-10-12 15:38:51,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:51,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098801379] [2020-10-12 15:38:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:51,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:51,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:51,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:51,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-12 15:38:51,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:38:51,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:51,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:38:51,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:51,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:51,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:51,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:51,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:51,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:51,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:51,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:51,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098801379] [2020-10-12 15:38:51,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:51,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:38:51,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063558770] [2020-10-12 15:38:51,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:38:51,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:38:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:38:51,838 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 14 states. [2020-10-12 15:38:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:52,907 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-10-12 15:38:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:38:52,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-12 15:38:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:52,909 INFO L225 Difference]: With dead ends: 151 [2020-10-12 15:38:52,909 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 15:38:52,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:38:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 15:38:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2020-10-12 15:38:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 15:38:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2020-10-12 15:38:52,925 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 32 [2020-10-12 15:38:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:52,925 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2020-10-12 15:38:52,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:38:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2020-10-12 15:38:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:38:52,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:52,926 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:52,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:38:52,926 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash -261935928, now seen corresponding path program 5 times [2020-10-12 15:38:52,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:52,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162445351] [2020-10-12 15:38:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:52,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:53,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:53,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:53,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:38:53,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-12 15:38:53,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:38:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:38:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:54,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:54,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:54,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:54,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:54,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:54,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:54,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:54,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162445351] [2020-10-12 15:38:54,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:54,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:38:54,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882008815] [2020-10-12 15:38:54,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:38:54,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:54,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:38:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:38:54,144 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand 15 states. [2020-10-12 15:38:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:55,146 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2020-10-12 15:38:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:38:55,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-12 15:38:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:55,148 INFO L225 Difference]: With dead ends: 173 [2020-10-12 15:38:55,148 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 15:38:55,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:38:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 15:38:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 116. [2020-10-12 15:38:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 15:38:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2020-10-12 15:38:55,167 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 32 [2020-10-12 15:38:55,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:55,168 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2020-10-12 15:38:55,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:38:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2020-10-12 15:38:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:38:55,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:55,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:55,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:38:55,169 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1388621508, now seen corresponding path program 1 times [2020-10-12 15:38:55,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:55,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535012487] [2020-10-12 15:38:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:55,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:55,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:55,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:38:55,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:55,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-12 15:38:55,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:38:55,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:55,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:55,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:55,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:55,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 15:38:55,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535012487] [2020-10-12 15:38:55,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:55,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:38:55,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849581342] [2020-10-12 15:38:55,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:55,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:55,354 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 8 states. [2020-10-12 15:38:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:55,574 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2020-10-12 15:38:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:38:55,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-12 15:38:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:55,575 INFO L225 Difference]: With dead ends: 136 [2020-10-12 15:38:55,575 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:38:55,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:38:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:38:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-12 15:38:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 15:38:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-10-12 15:38:55,593 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 33 [2020-10-12 15:38:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:55,594 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-10-12 15:38:55,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:38:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-10-12 15:38:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:38:55,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:55,595 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:55,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:38:55,595 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1410564504, now seen corresponding path program 6 times [2020-10-12 15:38:55,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:55,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270839666] [2020-10-12 15:38:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:55,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:56,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:38:56,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:56,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-12 15:38:56,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:56,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:38:56,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:38:56,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:56,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:56,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:56,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:56,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:56,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:38:56,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:56,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:56,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270839666] [2020-10-12 15:38:56,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:56,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:38:56,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101278893] [2020-10-12 15:38:56,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:38:56,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:38:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:38:56,877 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 15 states. [2020-10-12 15:38:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:58,080 INFO L93 Difference]: Finished difference Result 163 states and 199 transitions. [2020-10-12 15:38:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:38:58,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-12 15:38:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:58,082 INFO L225 Difference]: With dead ends: 163 [2020-10-12 15:38:58,082 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 15:38:58,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:38:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 15:38:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 114. [2020-10-12 15:38:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 15:38:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2020-10-12 15:38:58,108 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 138 transitions. Word has length 33 [2020-10-12 15:38:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:58,109 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-10-12 15:38:58,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:38:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 138 transitions. [2020-10-12 15:38:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:38:58,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:58,110 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:58,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:38:58,110 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:58,111 INFO L82 PathProgramCache]: Analyzing trace with hash 277324717, now seen corresponding path program 8 times [2020-10-12 15:38:58,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:58,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002855071] [2020-10-12 15:38:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:58,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:58,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:38:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:59,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:59,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:59,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:38:59,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:59,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002855071] [2020-10-12 15:38:59,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:59,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:38:59,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611199261] [2020-10-12 15:38:59,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:38:59,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:38:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:38:59,741 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. Second operand 15 states. [2020-10-12 15:39:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:01,079 INFO L93 Difference]: Finished difference Result 173 states and 209 transitions. [2020-10-12 15:39:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:01,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-12 15:39:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:01,081 INFO L225 Difference]: With dead ends: 173 [2020-10-12 15:39:01,081 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 15:39:01,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:39:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 15:39:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2020-10-12 15:39:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 15:39:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2020-10-12 15:39:01,105 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 33 [2020-10-12 15:39:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:01,105 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2020-10-12 15:39:01,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2020-10-12 15:39:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:01,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:01,106 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:01,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:39:01,106 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash -576304635, now seen corresponding path program 9 times [2020-10-12 15:39:01,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:01,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186510918] [2020-10-12 15:39:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:01,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:01,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:01,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-12 15:39:01,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:39:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:01,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:01,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:01,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:01,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:01,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:01,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:01,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186510918] [2020-10-12 15:39:01,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:01,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:01,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082246051] [2020-10-12 15:39:01,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:01,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:01,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:01,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:01,708 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand 14 states. [2020-10-12 15:39:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:02,349 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2020-10-12 15:39:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:02,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:39:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:02,351 INFO L225 Difference]: With dead ends: 159 [2020-10-12 15:39:02,351 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 15:39:02,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 15:39:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2020-10-12 15:39:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 15:39:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-10-12 15:39:02,373 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 34 [2020-10-12 15:39:02,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:02,374 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-10-12 15:39:02,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-10-12 15:39:02,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:02,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:02,374 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:02,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:39:02,375 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:02,375 INFO L82 PathProgramCache]: Analyzing trace with hash -873895175, now seen corresponding path program 2 times [2020-10-12 15:39:02,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:02,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363414212] [2020-10-12 15:39:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:02,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:03,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:03,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:03,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-12 15:39:03,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:03,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:03,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:03,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:03,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:03,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363414212] [2020-10-12 15:39:03,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:03,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:03,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569910595] [2020-10-12 15:39:03,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:03,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:03,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:03,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:03,502 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 15 states. [2020-10-12 15:39:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:04,497 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2020-10-12 15:39:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:04,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:39:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:04,499 INFO L225 Difference]: With dead ends: 167 [2020-10-12 15:39:04,499 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 15:39:04,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:39:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 15:39:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2020-10-12 15:39:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 15:39:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-10-12 15:39:04,522 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 34 [2020-10-12 15:39:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:04,522 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-10-12 15:39:04,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-10-12 15:39:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:04,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:04,523 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:04,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:39:04,523 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:04,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:04,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1570140037, now seen corresponding path program 10 times [2020-10-12 15:39:04,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:04,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048733795] [2020-10-12 15:39:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:04,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:05,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:05,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:05,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:05,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-12 15:39:05,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:39:05,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:05,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:05,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:05,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:05,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:05,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:05,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:05,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:05,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:05,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:05,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048733795] [2020-10-12 15:39:05,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:05,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:05,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886630719] [2020-10-12 15:39:05,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:05,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:05,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:05,754 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 14 states. [2020-10-12 15:39:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:06,551 INFO L93 Difference]: Finished difference Result 185 states and 224 transitions. [2020-10-12 15:39:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:06,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:39:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:06,552 INFO L225 Difference]: With dead ends: 185 [2020-10-12 15:39:06,552 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 15:39:06,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:39:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 15:39:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 144. [2020-10-12 15:39:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-12 15:39:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 180 transitions. [2020-10-12 15:39:06,579 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 180 transitions. Word has length 34 [2020-10-12 15:39:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:06,580 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 180 transitions. [2020-10-12 15:39:06,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 180 transitions. [2020-10-12 15:39:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:06,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:06,581 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:06,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:39:06,581 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:06,582 INFO L82 PathProgramCache]: Analyzing trace with hash 294930843, now seen corresponding path program 8 times [2020-10-12 15:39:06,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:06,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740462659] [2020-10-12 15:39:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:06,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:07,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:07,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:07,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-12 15:39:07,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:07,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:07,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:07,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:07,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:07,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:07,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:07,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:07,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:07,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:07,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740462659] [2020-10-12 15:39:07,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:07,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:07,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330976199] [2020-10-12 15:39:07,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:07,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:07,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:07,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:07,432 INFO L87 Difference]: Start difference. First operand 144 states and 180 transitions. Second operand 15 states. [2020-10-12 15:39:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:09,322 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2020-10-12 15:39:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:39:09,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 15:39:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:09,324 INFO L225 Difference]: With dead ends: 200 [2020-10-12 15:39:09,324 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 15:39:09,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:39:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 15:39:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 144. [2020-10-12 15:39:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-12 15:39:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 180 transitions. [2020-10-12 15:39:09,345 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 180 transitions. Word has length 34 [2020-10-12 15:39:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:09,346 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 180 transitions. [2020-10-12 15:39:09,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 180 transitions. [2020-10-12 15:39:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:39:09,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:09,347 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:09,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:39:09,347 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1870783017, now seen corresponding path program 11 times [2020-10-12 15:39:09,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:09,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014306977] [2020-10-12 15:39:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:09,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:09,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:39:09,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:09,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-12 15:39:09,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:09,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:10,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:10,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:10,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:10,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:10,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:10,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:10,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014306977] [2020-10-12 15:39:10,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:10,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:10,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928638729] [2020-10-12 15:39:10,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:10,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:10,323 INFO L87 Difference]: Start difference. First operand 144 states and 180 transitions. Second operand 15 states. [2020-10-12 15:39:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:11,304 INFO L93 Difference]: Finished difference Result 182 states and 224 transitions. [2020-10-12 15:39:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:11,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-12 15:39:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:11,306 INFO L225 Difference]: With dead ends: 182 [2020-10-12 15:39:11,307 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 15:39:11,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:39:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 15:39:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 153. [2020-10-12 15:39:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 15:39:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2020-10-12 15:39:11,355 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 35 [2020-10-12 15:39:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:11,355 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2020-10-12 15:39:11,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2020-10-12 15:39:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:39:11,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:11,358 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:11,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:39:11,358 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash -791216267, now seen corresponding path program 9 times [2020-10-12 15:39:11,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:11,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583294465] [2020-10-12 15:39:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:11,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:11,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:11,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:39:11,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-12 15:39:11,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:11,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:12,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:12,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:12,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:12,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:12,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:12,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:12,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:12,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583294465] [2020-10-12 15:39:12,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:12,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:12,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465685768] [2020-10-12 15:39:12,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:12,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:12,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:12,216 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand 14 states. [2020-10-12 15:39:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:13,627 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2020-10-12 15:39:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:39:13,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-12 15:39:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:13,628 INFO L225 Difference]: With dead ends: 186 [2020-10-12 15:39:13,629 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 15:39:13,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:39:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 15:39:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2020-10-12 15:39:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 15:39:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 191 transitions. [2020-10-12 15:39:13,653 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 191 transitions. Word has length 35 [2020-10-12 15:39:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:13,653 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 191 transitions. [2020-10-12 15:39:13,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2020-10-12 15:39:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:39:13,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:13,653 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:13,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:39:13,654 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash 640404195, now seen corresponding path program 7 times [2020-10-12 15:39:13,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:13,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754486576] [2020-10-12 15:39:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:13,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:14,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:14,622 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 60 [2020-10-12 15:39:14,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:14,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:14,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:14,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:14,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:14,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:14,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:15,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754486576] [2020-10-12 15:39:15,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:15,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:15,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428451562] [2020-10-12 15:39:15,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:15,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:15,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:15,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:15,009 INFO L87 Difference]: Start difference. First operand 153 states and 191 transitions. Second operand 16 states. [2020-10-12 15:39:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:16,596 INFO L93 Difference]: Finished difference Result 222 states and 271 transitions. [2020-10-12 15:39:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:39:16,597 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-12 15:39:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:16,598 INFO L225 Difference]: With dead ends: 222 [2020-10-12 15:39:16,598 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 15:39:16,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:39:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 15:39:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 153. [2020-10-12 15:39:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 15:39:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 191 transitions. [2020-10-12 15:39:16,622 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 191 transitions. Word has length 35 [2020-10-12 15:39:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:16,622 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 191 transitions. [2020-10-12 15:39:16,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2020-10-12 15:39:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:39:16,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:16,623 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:16,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:39:16,624 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1966673880, now seen corresponding path program 12 times [2020-10-12 15:39:16,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:16,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687256425] [2020-10-12 15:39:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:17,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:17,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:39:17,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:17,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-12 15:39:17,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:17,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:17,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:17,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:17,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:18,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:18,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:18,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:18,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:18,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:18,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:18,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:18,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687256425] [2020-10-12 15:39:18,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:18,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:18,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001300804] [2020-10-12 15:39:18,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:18,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:18,196 INFO L87 Difference]: Start difference. First operand 153 states and 191 transitions. Second operand 16 states. [2020-10-12 15:39:18,714 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-12 15:39:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:19,336 INFO L93 Difference]: Finished difference Result 185 states and 223 transitions. [2020-10-12 15:39:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:19,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-12 15:39:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:19,338 INFO L225 Difference]: With dead ends: 185 [2020-10-12 15:39:19,338 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 15:39:19,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:39:19,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 15:39:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 151. [2020-10-12 15:39:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 15:39:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2020-10-12 15:39:19,361 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 35 [2020-10-12 15:39:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:19,361 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2020-10-12 15:39:19,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2020-10-12 15:39:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:39:19,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:19,362 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:19,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:39:19,362 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1725155178, now seen corresponding path program 13 times [2020-10-12 15:39:19,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:19,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346354957] [2020-10-12 15:39:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:39:19,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:19,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:19,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:19,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:19,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346354957] [2020-10-12 15:39:19,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:19,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:39:19,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825936301] [2020-10-12 15:39:19,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:39:19,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:39:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:19,894 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 14 states. [2020-10-12 15:39:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:20,540 INFO L93 Difference]: Finished difference Result 165 states and 204 transitions. [2020-10-12 15:39:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:20,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-12 15:39:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:20,542 INFO L225 Difference]: With dead ends: 165 [2020-10-12 15:39:20,542 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 15:39:20,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:39:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 15:39:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-12 15:39:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 15:39:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 181 transitions. [2020-10-12 15:39:20,564 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 181 transitions. Word has length 36 [2020-10-12 15:39:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:20,564 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 181 transitions. [2020-10-12 15:39:20,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:39:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 181 transitions. [2020-10-12 15:39:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:39:20,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:20,565 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:20,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:39:20,565 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:20,566 INFO L82 PathProgramCache]: Analyzing trace with hash -149056189, now seen corresponding path program 8 times [2020-10-12 15:39:20,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:20,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291984919] [2020-10-12 15:39:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:20,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:21,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:21,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:39:21,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:21,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-12 15:39:21,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:21,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:21,503 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 46 [2020-10-12 15:39:21,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:21,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:21,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:21,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:21,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:21,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:21,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:21,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:21,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291984919] [2020-10-12 15:39:21,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:21,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:21,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667500859] [2020-10-12 15:39:21,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:21,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:21,718 INFO L87 Difference]: Start difference. First operand 145 states and 181 transitions. Second operand 15 states. [2020-10-12 15:39:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:23,361 INFO L93 Difference]: Finished difference Result 207 states and 254 transitions. [2020-10-12 15:39:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:39:23,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 15:39:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:23,363 INFO L225 Difference]: With dead ends: 207 [2020-10-12 15:39:23,363 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 15:39:23,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:39:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 15:39:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2020-10-12 15:39:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 15:39:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 188 transitions. [2020-10-12 15:39:23,409 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 188 transitions. Word has length 36 [2020-10-12 15:39:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:23,409 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 188 transitions. [2020-10-12 15:39:23,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 188 transitions. [2020-10-12 15:39:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:39:23,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:23,410 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:23,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:39:23,410 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:23,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1420784406, now seen corresponding path program 14 times [2020-10-12 15:39:23,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:23,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552834882] [2020-10-12 15:39:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:23,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:23,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:23,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:23,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:39:23,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-12 15:39:23,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:23,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:23,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:23,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:39:23,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:24,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:24,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:24,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:24,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:24,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:24,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:24,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:24,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552834882] [2020-10-12 15:39:24,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:24,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:24,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567897964] [2020-10-12 15:39:24,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:24,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:24,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:24,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:24,605 INFO L87 Difference]: Start difference. First operand 152 states and 188 transitions. Second operand 16 states. [2020-10-12 15:39:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:25,828 INFO L93 Difference]: Finished difference Result 185 states and 228 transitions. [2020-10-12 15:39:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:39:25,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-12 15:39:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:25,829 INFO L225 Difference]: With dead ends: 185 [2020-10-12 15:39:25,829 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 15:39:25,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:39:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 15:39:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 152. [2020-10-12 15:39:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 15:39:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 188 transitions. [2020-10-12 15:39:25,865 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 188 transitions. Word has length 36 [2020-10-12 15:39:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:25,865 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 188 transitions. [2020-10-12 15:39:25,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 188 transitions. [2020-10-12 15:39:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:39:25,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:25,866 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:25,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:39:25,866 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1718374946, now seen corresponding path program 3 times [2020-10-12 15:39:25,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:25,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050515030] [2020-10-12 15:39:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:26,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:39:26,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:26,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-12 15:39:26,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:26,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:39:26,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:26,981 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-12 15:39:27,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:27,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:27,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:27,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:27,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:27,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:27,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:27,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:27,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:27,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:27,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:27,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050515030] [2020-10-12 15:39:27,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:27,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:27,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770634685] [2020-10-12 15:39:27,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:27,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:27,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:27,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:27,262 INFO L87 Difference]: Start difference. First operand 152 states and 188 transitions. Second operand 16 states. [2020-10-12 15:39:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:28,396 INFO L93 Difference]: Finished difference Result 196 states and 238 transitions. [2020-10-12 15:39:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:39:28,397 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-12 15:39:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:28,399 INFO L225 Difference]: With dead ends: 196 [2020-10-12 15:39:28,399 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 15:39:28,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:39:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 15:39:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 152. [2020-10-12 15:39:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 15:39:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 188 transitions. [2020-10-12 15:39:28,425 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 188 transitions. Word has length 36 [2020-10-12 15:39:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:28,425 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 188 transitions. [2020-10-12 15:39:28,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 188 transitions. [2020-10-12 15:39:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:39:28,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:28,426 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:28,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:39:28,426 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash -549548928, now seen corresponding path program 10 times [2020-10-12 15:39:28,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:28,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44370017] [2020-10-12 15:39:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:28,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:28,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:28,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:39:28,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:28,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-12 15:39:28,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:28,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:28,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:39:28,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:29,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:29,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:29,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:29,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:29,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:29,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44370017] [2020-10-12 15:39:29,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:29,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:29,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607595737] [2020-10-12 15:39:29,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:29,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:29,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:29,334 INFO L87 Difference]: Start difference. First operand 152 states and 188 transitions. Second operand 16 states. [2020-10-12 15:39:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:31,454 INFO L93 Difference]: Finished difference Result 211 states and 259 transitions. [2020-10-12 15:39:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:39:31,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-12 15:39:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:31,456 INFO L225 Difference]: With dead ends: 211 [2020-10-12 15:39:31,457 INFO L226 Difference]: Without dead ends: 209 [2020-10-12 15:39:31,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:39:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-12 15:39:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 152. [2020-10-12 15:39:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 15:39:31,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 188 transitions. [2020-10-12 15:39:31,492 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 188 transitions. Word has length 36 [2020-10-12 15:39:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:31,492 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 188 transitions. [2020-10-12 15:39:31,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 188 transitions. [2020-10-12 15:39:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:39:31,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:31,493 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:31,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:39:31,493 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1023021380, now seen corresponding path program 15 times [2020-10-12 15:39:31,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:31,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767064280] [2020-10-12 15:39:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:32,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:32,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:32,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:39:32,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:32,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-10-12 15:39:32,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:32,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:32,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:39:32,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:32,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:32,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:32,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:32,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:32,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:32,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:32,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:32,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:32,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767064280] [2020-10-12 15:39:32,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:32,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:32,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300673920] [2020-10-12 15:39:32,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:32,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:32,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:32,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:32,944 INFO L87 Difference]: Start difference. First operand 152 states and 188 transitions. Second operand 15 states. [2020-10-12 15:39:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:33,623 INFO L93 Difference]: Finished difference Result 184 states and 226 transitions. [2020-10-12 15:39:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:39:33,623 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 15:39:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:33,625 INFO L225 Difference]: With dead ends: 184 [2020-10-12 15:39:33,625 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 15:39:33,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 15:39:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2020-10-12 15:39:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 15:39:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 192 transitions. [2020-10-12 15:39:33,656 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 192 transitions. Word has length 37 [2020-10-12 15:39:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:33,656 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 192 transitions. [2020-10-12 15:39:33,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 192 transitions. [2020-10-12 15:39:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:39:33,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:33,657 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:33,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:39:33,657 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1898648338, now seen corresponding path program 4 times [2020-10-12 15:39:33,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:33,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764033545] [2020-10-12 15:39:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:33,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:34,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:34,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:39:34,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:34,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-12 15:39:34,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:34,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:39:34,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:34,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:39:34,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:34,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:34,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:34,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:34,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:34,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:34,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:34,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:34,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:34,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764033545] [2020-10-12 15:39:34,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:34,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:39:34,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146704028] [2020-10-12 15:39:34,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:39:34,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:39:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:34,832 INFO L87 Difference]: Start difference. First operand 156 states and 192 transitions. Second operand 15 states. [2020-10-12 15:39:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:35,777 INFO L93 Difference]: Finished difference Result 185 states and 227 transitions. [2020-10-12 15:39:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:39:35,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-12 15:39:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:35,778 INFO L225 Difference]: With dead ends: 185 [2020-10-12 15:39:35,778 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 15:39:35,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:39:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 15:39:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2020-10-12 15:39:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 15:39:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 186 transitions. [2020-10-12 15:39:35,803 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 186 transitions. Word has length 37 [2020-10-12 15:39:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:35,803 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 186 transitions. [2020-10-12 15:39:35,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:39:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 186 transitions. [2020-10-12 15:39:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:39:35,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:35,804 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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 15:39:35,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:39:35,804 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2015115154, now seen corresponding path program 16 times [2020-10-12 15:39:35,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:35,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836481230] [2020-10-12 15:39:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:36,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:36,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:39:36,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:36,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-12 15:39:36,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:36,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:36,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:37,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:37,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:37,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:37,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836481230] [2020-10-12 15:39:37,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:37,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:37,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890899294] [2020-10-12 15:39:37,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:37,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:37,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:37,317 INFO L87 Difference]: Start difference. First operand 152 states and 186 transitions. Second operand 16 states. [2020-10-12 15:39:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:38,317 INFO L93 Difference]: Finished difference Result 190 states and 232 transitions. [2020-10-12 15:39:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:39:38,317 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 15:39:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:38,319 INFO L225 Difference]: With dead ends: 190 [2020-10-12 15:39:38,319 INFO L226 Difference]: Without dead ends: 188 [2020-10-12 15:39:38,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:39:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-12 15:39:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 157. [2020-10-12 15:39:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 15:39:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 193 transitions. [2020-10-12 15:39:38,350 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 193 transitions. Word has length 37 [2020-10-12 15:39:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:38,351 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 193 transitions. [2020-10-12 15:39:38,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 193 transitions. [2020-10-12 15:39:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:39:38,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:38,351 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:38,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 15:39:38,352 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1200285392, now seen corresponding path program 11 times [2020-10-12 15:39:38,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:38,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140700951] [2020-10-12 15:39:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:38,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:38,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:38,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:39:38,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:38,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-12 15:39:38,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:38,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:38,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:39,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:39,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:39,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:39,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:39,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:39,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140700951] [2020-10-12 15:39:39,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:39,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:39,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534155117] [2020-10-12 15:39:39,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:39,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:39,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:39,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:39,137 INFO L87 Difference]: Start difference. First operand 157 states and 193 transitions. Second operand 16 states. [2020-10-12 15:39:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:40,836 INFO L93 Difference]: Finished difference Result 191 states and 231 transitions. [2020-10-12 15:39:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:39:40,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 15:39:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:40,838 INFO L225 Difference]: With dead ends: 191 [2020-10-12 15:39:40,838 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 15:39:40,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:39:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 15:39:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 164. [2020-10-12 15:39:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 15:39:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 200 transitions. [2020-10-12 15:39:40,868 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 200 transitions. Word has length 37 [2020-10-12 15:39:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:40,869 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 200 transitions. [2020-10-12 15:39:40,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 200 transitions. [2020-10-12 15:39:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:39:40,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:40,870 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:40,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 15:39:40,870 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash 231335070, now seen corresponding path program 9 times [2020-10-12 15:39:40,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:40,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041623305] [2020-10-12 15:39:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:40,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:41,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:41,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:41,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:39:41,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:41,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-10-12 15:39:41,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:39:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:39:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:42,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:42,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:42,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:42,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:42,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:42,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:42,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:42,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:42,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:42,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:42,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:42,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041623305] [2020-10-12 15:39:42,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:42,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:39:42,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281125402] [2020-10-12 15:39:42,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:39:42,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:42,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:39:42,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:42,693 INFO L87 Difference]: Start difference. First operand 164 states and 200 transitions. Second operand 17 states. [2020-10-12 15:39:43,176 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-12 15:39:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:44,473 INFO L93 Difference]: Finished difference Result 218 states and 261 transitions. [2020-10-12 15:39:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:39:44,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-12 15:39:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:44,475 INFO L225 Difference]: With dead ends: 218 [2020-10-12 15:39:44,476 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 15:39:44,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:39:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 15:39:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2020-10-12 15:39:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 15:39:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 178 transitions. [2020-10-12 15:39:44,516 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 178 transitions. Word has length 37 [2020-10-12 15:39:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:44,517 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 178 transitions. [2020-10-12 15:39:44,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:39:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 178 transitions. [2020-10-12 15:39:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:44,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:44,518 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:44,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 15:39:44,518 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1460867072, now seen corresponding path program 17 times [2020-10-12 15:39:44,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:44,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014808163] [2020-10-12 15:39:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:44,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:44,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:44,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:44,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:44,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 15:39:44,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:44,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:44,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:44,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:44,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:44,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:44,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:44,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:44,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:44,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:44,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 15:39:44,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014808163] [2020-10-12 15:39:44,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:44,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:44,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054845447] [2020-10-12 15:39:44,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:44,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:44,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:44,765 INFO L87 Difference]: Start difference. First operand 148 states and 178 transitions. Second operand 10 states. [2020-10-12 15:39:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:45,139 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2020-10-12 15:39:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:39:45,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-12 15:39:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:45,140 INFO L225 Difference]: With dead ends: 163 [2020-10-12 15:39:45,140 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 15:39:45,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 15:39:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-12 15:39:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 15:39:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2020-10-12 15:39:45,170 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 38 [2020-10-12 15:39:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:45,170 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2020-10-12 15:39:45,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2020-10-12 15:39:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:45,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:45,171 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:45,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 15:39:45,171 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1928914191, now seen corresponding path program 18 times [2020-10-12 15:39:45,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:45,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212451484] [2020-10-12 15:39:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:45,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:45,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:46,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:47,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:47,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:47,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:39:47,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2604 [2020-10-12 15:39:47,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:39:47,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:48,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:48,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:48,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:48,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:48,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:48,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:48,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:48,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:48,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212451484] [2020-10-12 15:39:48,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:48,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:48,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468769944] [2020-10-12 15:39:48,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:48,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:48,454 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand 16 states. [2020-10-12 15:39:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:49,156 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2020-10-12 15:39:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:49,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:39:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:49,158 INFO L225 Difference]: With dead ends: 152 [2020-10-12 15:39:49,159 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 15:39:49,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:39:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 15:39:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-10-12 15:39:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 15:39:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2020-10-12 15:39:49,195 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 38 [2020-10-12 15:39:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:49,195 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2020-10-12 15:39:49,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:39:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2020-10-12 15:39:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:49,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:49,196 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:49,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 15:39:49,196 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 54702824, now seen corresponding path program 10 times [2020-10-12 15:39:49,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:49,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712014671] [2020-10-12 15:39:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:49,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:49,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:50,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:50,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:50,726 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 65 [2020-10-12 15:39:50,851 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2020-10-12 15:39:51,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:51,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:51,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:51,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:51,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:51,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:51,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:51,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:51,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:51,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712014671] [2020-10-12 15:39:51,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:51,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:39:51,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296137983] [2020-10-12 15:39:51,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:39:51,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:39:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:51,252 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand 17 states. [2020-10-12 15:39:53,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:53,351 INFO L93 Difference]: Finished difference Result 208 states and 256 transitions. [2020-10-12 15:39:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:39:53,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 15:39:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:53,353 INFO L225 Difference]: With dead ends: 208 [2020-10-12 15:39:53,353 INFO L226 Difference]: Without dead ends: 206 [2020-10-12 15:39:53,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:39:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-12 15:39:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-12 15:39:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 15:39:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2020-10-12 15:39:53,395 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 38 [2020-10-12 15:39:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:53,396 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2020-10-12 15:39:53,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:39:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2020-10-12 15:39:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:53,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:53,397 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:53,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 15:39:53,397 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:53,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1217025393, now seen corresponding path program 19 times [2020-10-12 15:39:53,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:53,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136833388] [2020-10-12 15:39:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:53,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:54,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:54,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:54,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:54,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-12 15:39:54,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:39:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:54,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:55,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:55,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:55,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:55,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:55,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:55,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:55,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:55,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136833388] [2020-10-12 15:39:55,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:55,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:39:55,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752034218] [2020-10-12 15:39:55,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:39:55,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:55,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:39:55,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:55,018 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand 17 states. [2020-10-12 15:39:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:56,098 INFO L93 Difference]: Finished difference Result 193 states and 232 transitions. [2020-10-12 15:39:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:39:56,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 15:39:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:56,099 INFO L225 Difference]: With dead ends: 193 [2020-10-12 15:39:56,100 INFO L226 Difference]: Without dead ends: 191 [2020-10-12 15:39:56,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:39:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-12 15:39:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 147. [2020-10-12 15:39:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 15:39:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2020-10-12 15:39:56,145 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 38 [2020-10-12 15:39:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:56,145 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2020-10-12 15:39:56,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:39:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2020-10-12 15:39:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:56,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:56,147 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:56,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 15:39:56,147 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1514615933, now seen corresponding path program 5 times [2020-10-12 15:39:56,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:56,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26604245] [2020-10-12 15:39:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:56,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:56,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:57,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:57,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:57,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-12 15:39:57,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:39:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:57,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:58,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:58,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:58,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:58,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:58,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:58,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:58,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:58,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:58,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26604245] [2020-10-12 15:39:58,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:58,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:39:58,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49934254] [2020-10-12 15:39:58,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:39:58,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:39:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:58,193 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand 17 states. [2020-10-12 15:39:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:59,362 INFO L93 Difference]: Finished difference Result 194 states and 232 transitions. [2020-10-12 15:39:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:59,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 15:39:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:59,363 INFO L225 Difference]: With dead ends: 194 [2020-10-12 15:39:59,363 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 15:39:59,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:39:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 15:39:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2020-10-12 15:39:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 15:39:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 179 transitions. [2020-10-12 15:39:59,394 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 179 transitions. Word has length 38 [2020-10-12 15:39:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:59,394 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 179 transitions. [2020-10-12 15:39:59,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:39:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 179 transitions. [2020-10-12 15:39:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:39:59,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:59,395 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:59,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 15:39:59,395 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 332521345, now seen corresponding path program 6 times [2020-10-12 15:39:59,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:59,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159949544] [2020-10-12 15:39:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:59,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:59,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:00,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:00,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:40:00,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:00,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-12 15:40:00,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:40:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:40:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:00,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:00,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:00,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:00,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:00,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:00,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:00,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:00,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:00,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:00,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:00,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:00,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159949544] [2020-10-12 15:40:00,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:00,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:40:00,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071910376] [2020-10-12 15:40:00,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:40:00,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:00,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:40:00,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:40:00,528 INFO L87 Difference]: Start difference. First operand 145 states and 179 transitions. Second operand 16 states. [2020-10-12 15:40:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:01,427 INFO L93 Difference]: Finished difference Result 177 states and 215 transitions. [2020-10-12 15:40:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:01,428 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-12 15:40:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:01,429 INFO L225 Difference]: With dead ends: 177 [2020-10-12 15:40:01,429 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 15:40:01,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 15:40:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2020-10-12 15:40:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 15:40:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2020-10-12 15:40:01,468 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 39 [2020-10-12 15:40:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:01,469 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2020-10-12 15:40:01,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:40:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2020-10-12 15:40:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:40:01,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:01,469 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:01,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 15:40:01,470 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:01,470 INFO L82 PathProgramCache]: Analyzing trace with hash 998540727, now seen corresponding path program 20 times [2020-10-12 15:40:01,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:01,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834185303] [2020-10-12 15:40:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:01,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:40:01,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:02,321 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 52 [2020-10-12 15:40:02,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:02,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:02,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:02,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:02,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:02,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:02,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834185303] [2020-10-12 15:40:02,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:02,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:40:02,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515462348] [2020-10-12 15:40:02,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:40:02,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:40:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:40:02,718 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand 16 states. [2020-10-12 15:40:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:03,950 INFO L93 Difference]: Finished difference Result 181 states and 218 transitions. [2020-10-12 15:40:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:03,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-12 15:40:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:03,952 INFO L225 Difference]: With dead ends: 181 [2020-10-12 15:40:03,952 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 15:40:03,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:40:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 15:40:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2020-10-12 15:40:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 15:40:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 183 transitions. [2020-10-12 15:40:03,995 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 183 transitions. Word has length 39 [2020-10-12 15:40:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:03,996 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 183 transitions. [2020-10-12 15:40:03,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:40:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 183 transitions. [2020-10-12 15:40:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:40:03,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:03,997 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 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 15:40:03,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 15:40:03,997 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash -374756851, now seen corresponding path program 7 times [2020-10-12 15:40:03,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:03,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686165488] [2020-10-12 15:40:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:04,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:04,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:40:04,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:04,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-12 15:40:04,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:04,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:04,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:04,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:40:04,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:05,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:05,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:05,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:05,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:05,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:05,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:05,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:05,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:05,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:05,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:05,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686165488] [2020-10-12 15:40:05,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:05,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:05,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521508481] [2020-10-12 15:40:05,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:05,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:05,430 INFO L87 Difference]: Start difference. First operand 149 states and 183 transitions. Second operand 17 states. [2020-10-12 15:40:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:06,779 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2020-10-12 15:40:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:40:06,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-12 15:40:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:06,780 INFO L225 Difference]: With dead ends: 192 [2020-10-12 15:40:06,780 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 15:40:06,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:40:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 15:40:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2020-10-12 15:40:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 15:40:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 183 transitions. [2020-10-12 15:40:06,825 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 183 transitions. Word has length 39 [2020-10-12 15:40:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:06,826 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 183 transitions. [2020-10-12 15:40:06,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 183 transitions. [2020-10-12 15:40:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:40:06,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:06,827 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:06,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 15:40:06,827 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash -258290035, now seen corresponding path program 21 times [2020-10-12 15:40:06,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:06,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727626423] [2020-10-12 15:40:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:07,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:08,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:40:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:08,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:08,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:08,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:08,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:08,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:08,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:08,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:08,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:08,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727626423] [2020-10-12 15:40:08,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:08,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:08,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045775471] [2020-10-12 15:40:08,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:08,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:08,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:08,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:08,705 INFO L87 Difference]: Start difference. First operand 149 states and 183 transitions. Second operand 17 states. [2020-10-12 15:40:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:09,921 INFO L93 Difference]: Finished difference Result 220 states and 264 transitions. [2020-10-12 15:40:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:09,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-12 15:40:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:09,922 INFO L225 Difference]: With dead ends: 220 [2020-10-12 15:40:09,922 INFO L226 Difference]: Without dead ends: 218 [2020-10-12 15:40:09,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:40:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-12 15:40:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 163. [2020-10-12 15:40:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 15:40:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 203 transitions. [2020-10-12 15:40:09,962 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 203 transitions. Word has length 39 [2020-10-12 15:40:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:09,962 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 203 transitions. [2020-10-12 15:40:09,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 203 transitions. [2020-10-12 15:40:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:40:09,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:09,963 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:09,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 15:40:09,964 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash 821276715, now seen corresponding path program 12 times [2020-10-12 15:40:09,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:09,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282577150] [2020-10-12 15:40:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:10,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:40:10,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:10,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-12 15:40:10,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:10,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:10,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:10,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:40:10,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:10,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:10,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:10,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:10,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:10,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:10,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:10,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282577150] [2020-10-12 15:40:10,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:10,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:10,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925358630] [2020-10-12 15:40:10,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:10,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:10,928 INFO L87 Difference]: Start difference. First operand 163 states and 203 transitions. Second operand 17 states. [2020-10-12 15:40:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:13,563 INFO L93 Difference]: Finished difference Result 237 states and 294 transitions. [2020-10-12 15:40:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:40:13,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-12 15:40:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:13,565 INFO L225 Difference]: With dead ends: 237 [2020-10-12 15:40:13,565 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 15:40:13,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:40:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 15:40:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 167. [2020-10-12 15:40:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 15:40:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 209 transitions. [2020-10-12 15:40:13,602 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 209 transitions. Word has length 39 [2020-10-12 15:40:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:13,603 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 209 transitions. [2020-10-12 15:40:13,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 209 transitions. [2020-10-12 15:40:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:40:13,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:13,603 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:13,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 15:40:13,603 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash -236206092, now seen corresponding path program 22 times [2020-10-12 15:40:13,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:13,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786347995] [2020-10-12 15:40:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:13,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:13,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:40:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:14,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:14,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:14,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:14,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:14,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:14,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:40:14,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786347995] [2020-10-12 15:40:14,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:14,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:14,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556612628] [2020-10-12 15:40:14,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:14,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:14,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:14,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:14,750 INFO L87 Difference]: Start difference. First operand 167 states and 209 transitions. Second operand 15 states. [2020-10-12 15:40:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:15,544 INFO L93 Difference]: Finished difference Result 213 states and 258 transitions. [2020-10-12 15:40:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:40:15,544 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-12 15:40:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:15,545 INFO L225 Difference]: With dead ends: 213 [2020-10-12 15:40:15,545 INFO L226 Difference]: Without dead ends: 195 [2020-10-12 15:40:15,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:40:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-12 15:40:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 165. [2020-10-12 15:40:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 15:40:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 205 transitions. [2020-10-12 15:40:15,592 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 205 transitions. Word has length 40 [2020-10-12 15:40:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:15,592 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 205 transitions. [2020-10-12 15:40:15,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 205 transitions. [2020-10-12 15:40:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:40:15,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:15,593 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:15,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 15:40:15,593 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1555715033, now seen corresponding path program 8 times [2020-10-12 15:40:15,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:15,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076610143] [2020-10-12 15:40:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:15,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:16,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:40:16,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:16,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-12 15:40:16,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:16,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:16,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:16,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:40:16,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:16,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:16,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:16,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:16,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:16,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:40:16,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076610143] [2020-10-12 15:40:16,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:16,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:16,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833499603] [2020-10-12 15:40:16,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:16,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:16,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:16,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:16,639 INFO L87 Difference]: Start difference. First operand 165 states and 205 transitions. Second operand 15 states. [2020-10-12 15:40:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:17,653 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2020-10-12 15:40:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:40:17,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-12 15:40:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:17,655 INFO L225 Difference]: With dead ends: 187 [2020-10-12 15:40:17,655 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 15:40:17,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:40:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 15:40:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 165. [2020-10-12 15:40:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 15:40:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2020-10-12 15:40:17,695 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 40 [2020-10-12 15:40:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:17,695 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2020-10-12 15:40:17,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2020-10-12 15:40:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:40:17,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:17,696 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:17,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 15:40:17,696 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash -295217051, now seen corresponding path program 23 times [2020-10-12 15:40:17,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:17,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478122336] [2020-10-12 15:40:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:17,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:18,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:18,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:18,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:40:18,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1147 [2020-10-12 15:40:18,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:18,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:40:18,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:19,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:19,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:19,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:19,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:19,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:19,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:19,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:19,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:19,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478122336] [2020-10-12 15:40:19,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:19,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:19,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014955295] [2020-10-12 15:40:19,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:19,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:19,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:19,372 INFO L87 Difference]: Start difference. First operand 165 states and 204 transitions. Second operand 17 states. [2020-10-12 15:40:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:20,880 INFO L93 Difference]: Finished difference Result 195 states and 239 transitions. [2020-10-12 15:40:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:40:20,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-12 15:40:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:20,883 INFO L225 Difference]: With dead ends: 195 [2020-10-12 15:40:20,883 INFO L226 Difference]: Without dead ends: 193 [2020-10-12 15:40:20,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:40:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-12 15:40:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 172. [2020-10-12 15:40:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 15:40:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2020-10-12 15:40:20,925 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 40 [2020-10-12 15:40:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:20,926 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2020-10-12 15:40:20,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2020-10-12 15:40:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:40:20,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:20,927 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:20,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 15:40:20,927 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2081315461, now seen corresponding path program 13 times [2020-10-12 15:40:20,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:20,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307957195] [2020-10-12 15:40:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:20,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:21,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:40:21,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:21,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:21,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:21,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:21,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:21,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:21,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:21,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:21,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:21,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307957195] [2020-10-12 15:40:21,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:21,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:40:21,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184184203] [2020-10-12 15:40:21,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:40:21,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:40:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:40:21,894 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand 16 states. [2020-10-12 15:40:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:24,009 INFO L93 Difference]: Finished difference Result 211 states and 256 transitions. [2020-10-12 15:40:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:40:24,009 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-12 15:40:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:24,010 INFO L225 Difference]: With dead ends: 211 [2020-10-12 15:40:24,010 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 15:40:24,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:40:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 15:40:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2020-10-12 15:40:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 15:40:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2020-10-12 15:40:24,049 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 40 [2020-10-12 15:40:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:24,049 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2020-10-12 15:40:24,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:40:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2020-10-12 15:40:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:40:24,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:24,050 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:24,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 15:40:24,051 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1701381299, now seen corresponding path program 11 times [2020-10-12 15:40:24,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:24,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885889024] [2020-10-12 15:40:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:24,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:25,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:25,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:40:25,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:25,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-12 15:40:25,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:25,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:40:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:40:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:25,737 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 71 [2020-10-12 15:40:26,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:26,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:26,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:26,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:26,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:26,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:26,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:26,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885889024] [2020-10-12 15:40:26,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:26,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:40:26,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798025136] [2020-10-12 15:40:26,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:40:26,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:40:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:26,281 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand 18 states. [2020-10-12 15:40:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:28,220 INFO L93 Difference]: Finished difference Result 274 states and 333 transitions. [2020-10-12 15:40:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:40:28,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-12 15:40:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:28,221 INFO L225 Difference]: With dead ends: 274 [2020-10-12 15:40:28,222 INFO L226 Difference]: Without dead ends: 272 [2020-10-12 15:40:28,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:40:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-12 15:40:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 189. [2020-10-12 15:40:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 15:40:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2020-10-12 15:40:28,270 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 40 [2020-10-12 15:40:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:28,270 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2020-10-12 15:40:28,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:40:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2020-10-12 15:40:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:40:28,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:28,271 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:28,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 15:40:28,272 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:28,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1321857780, now seen corresponding path program 24 times [2020-10-12 15:40:28,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:28,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899137184] [2020-10-12 15:40:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:28,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:29,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:29,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:40:29,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:29,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1291 [2020-10-12 15:40:29,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:40:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:29,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:40:29,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:30,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:30,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:30,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:30,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899137184] [2020-10-12 15:40:30,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:30,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:40:30,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106511367] [2020-10-12 15:40:30,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:40:30,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:40:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:30,250 INFO L87 Difference]: Start difference. First operand 189 states and 236 transitions. Second operand 18 states. [2020-10-12 15:40:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:31,535 INFO L93 Difference]: Finished difference Result 226 states and 273 transitions. [2020-10-12 15:40:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:31,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-12 15:40:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:31,536 INFO L225 Difference]: With dead ends: 226 [2020-10-12 15:40:31,537 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 15:40:31,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:40:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 15:40:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-10-12 15:40:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 15:40:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2020-10-12 15:40:31,578 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 40 [2020-10-12 15:40:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:31,579 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2020-10-12 15:40:31,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:40:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2020-10-12 15:40:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:40:31,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:31,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:31,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 15:40:31,579 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash -971907428, now seen corresponding path program 25 times [2020-10-12 15:40:31,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:31,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142606255] [2020-10-12 15:40:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:32,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:40:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:32,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:32,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:32,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:32,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:32,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:32,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:32,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:32,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:32,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142606255] [2020-10-12 15:40:32,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:32,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:32,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953493697] [2020-10-12 15:40:32,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:32,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:32,434 INFO L87 Difference]: Start difference. First operand 178 states and 222 transitions. Second operand 17 states. [2020-10-12 15:40:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:33,396 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2020-10-12 15:40:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:33,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-12 15:40:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:33,399 INFO L225 Difference]: With dead ends: 204 [2020-10-12 15:40:33,399 INFO L226 Difference]: Without dead ends: 197 [2020-10-12 15:40:33,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-12 15:40:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 180. [2020-10-12 15:40:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 15:40:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 224 transitions. [2020-10-12 15:40:33,442 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 224 transitions. Word has length 41 [2020-10-12 15:40:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:33,442 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 224 transitions. [2020-10-12 15:40:33,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 224 transitions. [2020-10-12 15:40:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:40:33,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:33,443 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:33,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 15:40:33,444 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:33,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:33,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1877283011, now seen corresponding path program 12 times [2020-10-12 15:40:33,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:33,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942646153] [2020-10-12 15:40:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:33,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:33,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:35,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:35,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:40:35,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:35,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1765 [2020-10-12 15:40:35,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:40:35,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:35,545 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-12 15:40:35,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:35,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:35,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:35,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:35,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:35,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:35,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:35,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:35,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942646153] [2020-10-12 15:40:35,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:35,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:35,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107283326] [2020-10-12 15:40:35,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:35,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:35,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:35,926 INFO L87 Difference]: Start difference. First operand 180 states and 224 transitions. Second operand 17 states. [2020-10-12 15:40:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:38,407 INFO L93 Difference]: Finished difference Result 260 states and 319 transitions. [2020-10-12 15:40:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:40:38,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-12 15:40:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:38,409 INFO L225 Difference]: With dead ends: 260 [2020-10-12 15:40:38,409 INFO L226 Difference]: Without dead ends: 237 [2020-10-12 15:40:38,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:40:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-12 15:40:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 187. [2020-10-12 15:40:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 15:40:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 231 transitions. [2020-10-12 15:40:38,454 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 231 transitions. Word has length 41 [2020-10-12 15:40:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:38,454 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 231 transitions. [2020-10-12 15:40:38,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 231 transitions. [2020-10-12 15:40:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:40:38,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:38,455 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:38,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 15:40:38,455 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1728488380, now seen corresponding path program 9 times [2020-10-12 15:40:38,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:38,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174327948] [2020-10-12 15:40:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:38,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:40:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:39,784 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-12 15:40:40,023 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 52 [2020-10-12 15:40:40,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:40,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:40,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:40,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:40,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174327948] [2020-10-12 15:40:40,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:40,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:40:40,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667715036] [2020-10-12 15:40:40,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:40:40,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:40,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:40:40,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:40,549 INFO L87 Difference]: Start difference. First operand 187 states and 231 transitions. Second operand 18 states. [2020-10-12 15:40:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:42,402 INFO L93 Difference]: Finished difference Result 221 states and 271 transitions. [2020-10-12 15:40:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:40:42,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-12 15:40:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:42,404 INFO L225 Difference]: With dead ends: 221 [2020-10-12 15:40:42,404 INFO L226 Difference]: Without dead ends: 219 [2020-10-12 15:40:42,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:40:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-12 15:40:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 189. [2020-10-12 15:40:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 15:40:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 233 transitions. [2020-10-12 15:40:42,452 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 233 transitions. Word has length 41 [2020-10-12 15:40:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:42,452 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 233 transitions. [2020-10-12 15:40:42,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:40:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 233 transitions. [2020-10-12 15:40:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:40:42,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:42,453 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:42,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 15:40:42,454 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1900459534, now seen corresponding path program 26 times [2020-10-12 15:40:42,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:42,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476662744] [2020-10-12 15:40:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:42,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:42,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:43,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:43,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:40:43,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:43,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-12 15:40:43,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:40:43,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:44,178 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-12 15:40:44,324 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-12 15:40:44,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:44,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:44,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:44,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:44,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:44,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:44,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:44,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:44,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476662744] [2020-10-12 15:40:44,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:44,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:44,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233741412] [2020-10-12 15:40:44,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:44,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:44,873 INFO L87 Difference]: Start difference. First operand 189 states and 233 transitions. Second operand 17 states. [2020-10-12 15:40:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:46,349 INFO L93 Difference]: Finished difference Result 267 states and 317 transitions. [2020-10-12 15:40:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:40:46,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-12 15:40:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:46,352 INFO L225 Difference]: With dead ends: 267 [2020-10-12 15:40:46,352 INFO L226 Difference]: Without dead ends: 261 [2020-10-12 15:40:46,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:40:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-12 15:40:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 198. [2020-10-12 15:40:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 15:40:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2020-10-12 15:40:46,401 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 41 [2020-10-12 15:40:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:46,401 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2020-10-12 15:40:46,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2020-10-12 15:40:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:40:46,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:46,405 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 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 15:40:46,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 15:40:46,405 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1021210184, now seen corresponding path program 10 times [2020-10-12 15:40:46,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72799525] [2020-10-12 15:40:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:46,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:47,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:47,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:40:47,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:47,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-12 15:40:47,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:40:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:40:47,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:48,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:48,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:48,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:48,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:48,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:48,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:48,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:48,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72799525] [2020-10-12 15:40:48,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:48,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:40:48,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632032436] [2020-10-12 15:40:48,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:40:48,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:40:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:48,347 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand 18 states. [2020-10-12 15:40:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:49,749 INFO L93 Difference]: Finished difference Result 248 states and 301 transitions. [2020-10-12 15:40:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:40:49,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-12 15:40:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:49,751 INFO L225 Difference]: With dead ends: 248 [2020-10-12 15:40:49,752 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 15:40:49,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:40:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 15:40:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 198. [2020-10-12 15:40:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 15:40:49,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2020-10-12 15:40:49,803 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 41 [2020-10-12 15:40:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:49,803 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2020-10-12 15:40:49,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:40:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2020-10-12 15:40:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:40:49,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:49,803 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:49,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 15:40:49,804 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:49,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2077723546, now seen corresponding path program 14 times [2020-10-12 15:40:49,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:49,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588139905] [2020-10-12 15:40:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:49,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:50,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:50,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:40:50,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-12 15:40:50,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:40:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:40:50,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:50,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:50,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:50,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:50,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:50,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:50,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:50,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:50,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:50,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588139905] [2020-10-12 15:40:50,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:50,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:40:50,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030529363] [2020-10-12 15:40:50,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:40:50,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:50,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:40:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:50,966 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand 18 states. [2020-10-12 15:40:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:54,103 INFO L93 Difference]: Finished difference Result 255 states and 312 transitions. [2020-10-12 15:40:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 15:40:54,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-12 15:40:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:54,104 INFO L225 Difference]: With dead ends: 255 [2020-10-12 15:40:54,105 INFO L226 Difference]: Without dead ends: 253 [2020-10-12 15:40:54,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:40:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-12 15:40:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 198. [2020-10-12 15:40:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 15:40:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2020-10-12 15:40:54,160 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 41 [2020-10-12 15:40:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:54,160 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2020-10-12 15:40:54,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:40:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2020-10-12 15:40:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:40:54,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:54,160 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:54,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 15:40:54,161 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:54,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1267383754, now seen corresponding path program 27 times [2020-10-12 15:40:54,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:54,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120364326] [2020-10-12 15:40:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:55,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:55,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:55,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:55,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:55,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:55,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:55,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:55,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:55,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120364326] [2020-10-12 15:40:55,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:55,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:40:55,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84327576] [2020-10-12 15:40:55,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:40:55,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:55,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:40:55,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:55,837 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand 18 states. [2020-10-12 15:40:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:57,119 INFO L93 Difference]: Finished difference Result 233 states and 286 transitions. [2020-10-12 15:40:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:57,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-12 15:40:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:57,123 INFO L225 Difference]: With dead ends: 233 [2020-10-12 15:40:57,123 INFO L226 Difference]: Without dead ends: 231 [2020-10-12 15:40:57,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:40:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-12 15:40:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 200. [2020-10-12 15:40:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 15:40:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2020-10-12 15:40:57,180 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 42 [2020-10-12 15:40:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:57,180 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2020-10-12 15:40:57,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:40:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2020-10-12 15:40:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:40:57,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:57,181 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:57,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 15:40:57,181 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1743287426, now seen corresponding path program 11 times [2020-10-12 15:40:57,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:57,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567742647] [2020-10-12 15:40:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:57,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:58,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:40:58,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:58,369 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-12 15:40:58,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:58,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:58,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:58,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:58,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567742647] [2020-10-12 15:40:58,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:58,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:58,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13866527] [2020-10-12 15:40:58,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:58,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:58,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:58,609 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand 17 states. [2020-10-12 15:41:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:00,074 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2020-10-12 15:41:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:41:00,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-12 15:41:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:00,075 INFO L225 Difference]: With dead ends: 232 [2020-10-12 15:41:00,075 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 15:41:00,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:41:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 15:41:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2020-10-12 15:41:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 15:41:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 242 transitions. [2020-10-12 15:41:00,130 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 242 transitions. Word has length 42 [2020-10-12 15:41:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:00,130 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 242 transitions. [2020-10-12 15:41:00,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:41:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 242 transitions. [2020-10-12 15:41:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:41:00,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:00,130 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:00,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 15:41:00,131 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1881020158, now seen corresponding path program 12 times [2020-10-12 15:41:00,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:00,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269496954] [2020-10-12 15:41:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:00,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:41:00,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:01,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:01,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:01,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:01,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:01,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:01,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:41:01,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:41:01,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269496954] [2020-10-12 15:41:01,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:01,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:01,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584680274] [2020-10-12 15:41:01,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:01,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:01,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:01,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:01,348 INFO L87 Difference]: Start difference. First operand 196 states and 242 transitions. Second operand 16 states. [2020-10-12 15:41:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:02,375 INFO L93 Difference]: Finished difference Result 230 states and 277 transitions. [2020-10-12 15:41:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:41:02,376 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-12 15:41:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:02,377 INFO L225 Difference]: With dead ends: 230 [2020-10-12 15:41:02,377 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 15:41:02,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:41:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 15:41:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 192. [2020-10-12 15:41:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 15:41:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 237 transitions. [2020-10-12 15:41:02,431 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 237 transitions. Word has length 42 [2020-10-12 15:41:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:02,431 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 237 transitions. [2020-10-12 15:41:02,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 237 transitions. [2020-10-12 15:41:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:41:02,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:02,431 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:02,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 15:41:02,432 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash 30088074, now seen corresponding path program 28 times [2020-10-12 15:41:02,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:02,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020839488] [2020-10-12 15:41:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:02,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:03,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:03,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:41:03,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:03,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-10-12 15:41:03,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:41:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:41:03,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:04,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:04,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:04,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:04,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:04,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:04,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:04,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:04,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:04,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:04,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:04,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:04,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020839488] [2020-10-12 15:41:04,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:04,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:41:04,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322719998] [2020-10-12 15:41:04,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:41:04,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:41:04,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:41:04,166 INFO L87 Difference]: Start difference. First operand 192 states and 237 transitions. Second operand 18 states. [2020-10-12 15:41:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:05,471 INFO L93 Difference]: Finished difference Result 222 states and 274 transitions. [2020-10-12 15:41:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:41:05,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-12 15:41:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:05,472 INFO L225 Difference]: With dead ends: 222 [2020-10-12 15:41:05,472 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 15:41:05,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:41:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 15:41:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 199. [2020-10-12 15:41:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-12 15:41:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2020-10-12 15:41:05,529 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 42 [2020-10-12 15:41:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:05,529 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2020-10-12 15:41:05,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:41:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2020-10-12 15:41:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:41:05,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:05,530 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:05,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 15:41:05,530 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:05,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:05,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1756010336, now seen corresponding path program 15 times [2020-10-12 15:41:05,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:05,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202840336] [2020-10-12 15:41:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:06,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:06,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:41:06,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-12 15:41:06,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:41:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:41:06,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:06,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:06,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:06,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:06,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:06,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202840336] [2020-10-12 15:41:06,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:06,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:41:06,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99661330] [2020-10-12 15:41:06,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:41:06,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:41:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:41:06,755 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand 18 states. [2020-10-12 15:41:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:09,219 INFO L93 Difference]: Finished difference Result 236 states and 287 transitions. [2020-10-12 15:41:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:41:09,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-12 15:41:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:09,221 INFO L225 Difference]: With dead ends: 236 [2020-10-12 15:41:09,222 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 15:41:09,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:41:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 15:41:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 206. [2020-10-12 15:41:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-12 15:41:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 253 transitions. [2020-10-12 15:41:09,284 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 253 transitions. Word has length 42 [2020-10-12 15:41:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:09,284 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 253 transitions. [2020-10-12 15:41:09,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:41:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 253 transitions. [2020-10-12 15:41:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:41:09,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:09,285 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:09,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 15:41:09,285 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1376076174, now seen corresponding path program 13 times [2020-10-12 15:41:09,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:09,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93135453] [2020-10-12 15:41:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:09,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:09,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:10,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:10,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:41:10,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:10,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-12 15:41:10,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:10,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:10,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:41:10,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:11,209 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-12 15:41:11,368 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-12 15:41:11,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:11,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:11,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:11,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:11,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:11,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:11,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:11,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:11,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:11,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:11,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93135453] [2020-10-12 15:41:11,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:11,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:11,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617362698] [2020-10-12 15:41:11,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:11,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:11,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:11,873 INFO L87 Difference]: Start difference. First operand 206 states and 253 transitions. Second operand 19 states. [2020-10-12 15:41:12,638 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-10-12 15:41:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:14,410 INFO L93 Difference]: Finished difference Result 275 states and 330 transitions. [2020-10-12 15:41:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:41:14,410 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-12 15:41:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:14,412 INFO L225 Difference]: With dead ends: 275 [2020-10-12 15:41:14,412 INFO L226 Difference]: Without dead ends: 273 [2020-10-12 15:41:14,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:41:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-12 15:41:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 183. [2020-10-12 15:41:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 15:41:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2020-10-12 15:41:14,474 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 42 [2020-10-12 15:41:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:14,474 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2020-10-12 15:41:14,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2020-10-12 15:41:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:41:14,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:14,475 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:14,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 15:41:14,475 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -492006847, now seen corresponding path program 29 times [2020-10-12 15:41:14,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:14,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233852203] [2020-10-12 15:41:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:14,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:14,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:14,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:41:14,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:14,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-12 15:41:14,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:14,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:41:14,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:14,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:41:14,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:15,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:15,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:15,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:15,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:15,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:15,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233852203] [2020-10-12 15:41:15,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:15,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:41:15,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721541571] [2020-10-12 15:41:15,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:41:15,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:15,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:41:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:41:15,595 INFO L87 Difference]: Start difference. First operand 183 states and 221 transitions. Second operand 17 states. [2020-10-12 15:41:15,887 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2020-10-12 15:41:16,381 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-12 15:41:16,895 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-12 15:41:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:16,908 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2020-10-12 15:41:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:41:16,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-12 15:41:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:16,909 INFO L225 Difference]: With dead ends: 201 [2020-10-12 15:41:16,909 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 15:41:16,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:41:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 15:41:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2020-10-12 15:41:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 15:41:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2020-10-12 15:41:16,970 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 43 [2020-10-12 15:41:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:16,970 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2020-10-12 15:41:16,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:41:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2020-10-12 15:41:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:41:16,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:16,971 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:16,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-12 15:41:16,971 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:16,971 INFO L82 PathProgramCache]: Analyzing trace with hash -551017806, now seen corresponding path program 30 times [2020-10-12 15:41:16,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:16,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112189130] [2020-10-12 15:41:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:16,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:17,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:41:17,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:17,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-12 15:41:17,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:41:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:41:17,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:17,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:17,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:17,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:17,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:17,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:17,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:17,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:41:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 15:41:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112189130] [2020-10-12 15:41:17,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:17,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:41:17,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402554191] [2020-10-12 15:41:17,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:41:17,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:17,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:41:17,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:41:17,466 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand 12 states. [2020-10-12 15:41:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:18,283 INFO L93 Difference]: Finished difference Result 203 states and 243 transitions. [2020-10-12 15:41:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:41:18,284 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-12 15:41:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:18,284 INFO L225 Difference]: With dead ends: 203 [2020-10-12 15:41:18,284 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 15:41:18,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:41:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 15:41:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-12 15:41:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 15:41:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 188 transitions. [2020-10-12 15:41:18,340 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 188 transitions. Word has length 43 [2020-10-12 15:41:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:18,340 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 188 transitions. [2020-10-12 15:41:18,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:41:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 188 transitions. [2020-10-12 15:41:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:41:18,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:18,341 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:18,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-12 15:41:18,342 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:18,342 INFO L82 PathProgramCache]: Analyzing trace with hash 522616855, now seen corresponding path program 31 times [2020-10-12 15:41:18,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:18,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713218258] [2020-10-12 15:41:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:18,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:41:19,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:20,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:20,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:20,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:20,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:20,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:20,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:20,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:20,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:20,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:20,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:20,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:20,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713218258] [2020-10-12 15:41:20,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:20,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:20,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697954998] [2020-10-12 15:41:20,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:20,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:20,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:20,521 INFO L87 Difference]: Start difference. First operand 156 states and 188 transitions. Second operand 19 states. [2020-10-12 15:41:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:21,706 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2020-10-12 15:41:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:41:21,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-12 15:41:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:21,707 INFO L225 Difference]: With dead ends: 179 [2020-10-12 15:41:21,707 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 15:41:21,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:41:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 15:41:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 158. [2020-10-12 15:41:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 15:41:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 190 transitions. [2020-10-12 15:41:21,764 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 190 transitions. Word has length 43 [2020-10-12 15:41:21,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:21,764 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 190 transitions. [2020-10-12 15:41:21,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 190 transitions. [2020-10-12 15:41:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:41:21,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:21,765 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:21,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-12 15:41:21,765 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -923160002, now seen corresponding path program 14 times [2020-10-12 15:41:21,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:21,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898852406] [2020-10-12 15:41:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:21,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:23,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:23,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:41:23,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1468 [2020-10-12 15:41:23,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:41:23,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:23,598 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-12 15:41:23,764 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-12 15:41:23,985 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2020-10-12 15:41:24,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:24,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:24,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:24,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:24,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:24,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:24,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:24,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:24,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:24,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:24,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:24,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898852406] [2020-10-12 15:41:24,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:24,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:24,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684139416] [2020-10-12 15:41:24,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:24,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:24,623 INFO L87 Difference]: Start difference. First operand 158 states and 190 transitions. Second operand 19 states. [2020-10-12 15:41:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:27,245 INFO L93 Difference]: Finished difference Result 234 states and 280 transitions. [2020-10-12 15:41:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:41:27,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-12 15:41:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:27,248 INFO L225 Difference]: With dead ends: 234 [2020-10-12 15:41:27,248 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 15:41:27,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:41:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 15:41:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 180. [2020-10-12 15:41:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 15:41:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 221 transitions. [2020-10-12 15:41:27,341 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 221 transitions. Word has length 43 [2020-10-12 15:41:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:27,342 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 221 transitions. [2020-10-12 15:41:27,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 221 transitions. [2020-10-12 15:41:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:41:27,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:27,343 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:27,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-12 15:41:27,343 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:27,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1071954633, now seen corresponding path program 13 times [2020-10-12 15:41:27,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:27,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878330357] [2020-10-12 15:41:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:27,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:28,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:28,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:41:28,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-12 15:41:28,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:41:28,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:28,820 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:41:29,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:29,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:29,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:29,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:29,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:29,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:29,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:29,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:29,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:29,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:29,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:29,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878330357] [2020-10-12 15:41:29,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:29,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:29,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351300520] [2020-10-12 15:41:29,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:29,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:29,271 INFO L87 Difference]: Start difference. First operand 180 states and 221 transitions. Second operand 19 states. [2020-10-12 15:41:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:30,885 INFO L93 Difference]: Finished difference Result 229 states and 272 transitions. [2020-10-12 15:41:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:41:30,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-12 15:41:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:30,887 INFO L225 Difference]: With dead ends: 229 [2020-10-12 15:41:30,887 INFO L226 Difference]: Without dead ends: 227 [2020-10-12 15:41:30,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:41:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-12 15:41:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 180. [2020-10-12 15:41:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 15:41:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 221 transitions. [2020-10-12 15:41:30,949 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 221 transitions. Word has length 43 [2020-10-12 15:41:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:30,950 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 221 transitions. [2020-10-12 15:41:30,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 221 transitions. [2020-10-12 15:41:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:41:30,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:30,951 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 3, 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 15:41:30,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-12 15:41:30,951 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1779232829, now seen corresponding path program 14 times [2020-10-12 15:41:30,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:30,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496615931] [2020-10-12 15:41:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:30,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:32,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:32,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:41:32,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:32,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1427 [2020-10-12 15:41:32,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:32,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:32,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:32,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:41:32,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:32,746 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:41:32,870 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-12 15:41:33,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:33,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:33,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:33,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:33,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:33,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496615931] [2020-10-12 15:41:33,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:33,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:33,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975600084] [2020-10-12 15:41:33,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:33,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:33,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:33,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:33,323 INFO L87 Difference]: Start difference. First operand 180 states and 221 transitions. Second operand 19 states. [2020-10-12 15:41:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:35,798 INFO L93 Difference]: Finished difference Result 238 states and 283 transitions. [2020-10-12 15:41:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:41:35,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-12 15:41:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:35,799 INFO L225 Difference]: With dead ends: 238 [2020-10-12 15:41:35,799 INFO L226 Difference]: Without dead ends: 236 [2020-10-12 15:41:35,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:41:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-12 15:41:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 180. [2020-10-12 15:41:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 15:41:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 221 transitions. [2020-10-12 15:41:35,869 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 221 transitions. Word has length 43 [2020-10-12 15:41:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:35,870 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 221 transitions. [2020-10-12 15:41:35,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 221 transitions. [2020-10-12 15:41:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:41:35,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:35,871 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:35,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-12 15:41:35,871 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1052475247, now seen corresponding path program 15 times [2020-10-12 15:41:35,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:35,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804069499] [2020-10-12 15:41:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:35,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:36,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:36,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:36,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:41:36,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:36,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-12 15:41:36,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:41:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:41:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:37,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:37,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:37,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:37,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:37,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:37,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:37,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804069499] [2020-10-12 15:41:37,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:37,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:41:37,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208997055] [2020-10-12 15:41:37,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:41:37,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:37,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:41:37,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:41:37,247 INFO L87 Difference]: Start difference. First operand 180 states and 221 transitions. Second operand 18 states. [2020-10-12 15:41:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:38,859 INFO L93 Difference]: Finished difference Result 206 states and 249 transitions. [2020-10-12 15:41:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:41:38,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-12 15:41:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:38,861 INFO L225 Difference]: With dead ends: 206 [2020-10-12 15:41:38,861 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 15:41:38,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:41:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 15:41:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2020-10-12 15:41:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 15:41:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 215 transitions. [2020-10-12 15:41:38,926 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 215 transitions. Word has length 44 [2020-10-12 15:41:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:38,926 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 215 transitions. [2020-10-12 15:41:38,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:41:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 215 transitions. [2020-10-12 15:41:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:41:38,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:38,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:38,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-12 15:41:38,928 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash 352996271, now seen corresponding path program 32 times [2020-10-12 15:41:38,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:38,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527335911] [2020-10-12 15:41:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:39,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:39,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:40,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:40,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:41:40,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1419 [2020-10-12 15:41:40,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:40,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:41:40,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:40,890 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 58 [2020-10-12 15:41:41,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:41,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:41,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:41,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:41,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:41,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:41,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:41,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:41,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527335911] [2020-10-12 15:41:41,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:41,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:41,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093043285] [2020-10-12 15:41:41,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:41,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:41,247 INFO L87 Difference]: Start difference. First operand 176 states and 215 transitions. Second operand 19 states. [2020-10-12 15:41:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:42,681 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2020-10-12 15:41:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:41:42,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-12 15:41:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:42,683 INFO L225 Difference]: With dead ends: 215 [2020-10-12 15:41:42,683 INFO L226 Difference]: Without dead ends: 213 [2020-10-12 15:41:42,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:41:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-12 15:41:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 180. [2020-10-12 15:41:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 15:41:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 220 transitions. [2020-10-12 15:41:42,749 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 220 transitions. Word has length 44 [2020-10-12 15:41:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:42,749 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 220 transitions. [2020-10-12 15:41:42,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 220 transitions. [2020-10-12 15:41:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:41:42,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:42,749 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:42,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-12 15:41:42,750 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1637292387, now seen corresponding path program 16 times [2020-10-12 15:41:42,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:42,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634127966] [2020-10-12 15:41:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:42,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:43,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:44,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:44,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:41:44,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:44,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1479 [2020-10-12 15:41:44,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:44,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:44,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:44,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:41:44,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:44,642 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-12 15:41:44,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:44,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:44,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:44,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634127966] [2020-10-12 15:41:44,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:44,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:44,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109474281] [2020-10-12 15:41:44,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:44,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:44,968 INFO L87 Difference]: Start difference. First operand 180 states and 220 transitions. Second operand 19 states. [2020-10-12 15:41:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:46,983 INFO L93 Difference]: Finished difference Result 229 states and 273 transitions. [2020-10-12 15:41:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:41:46,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-12 15:41:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:46,984 INFO L225 Difference]: With dead ends: 229 [2020-10-12 15:41:46,984 INFO L226 Difference]: Without dead ends: 227 [2020-10-12 15:41:46,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:41:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-12 15:41:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 180. [2020-10-12 15:41:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 15:41:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 220 transitions. [2020-10-12 15:41:47,052 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 220 transitions. Word has length 44 [2020-10-12 15:41:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:47,052 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 220 transitions. [2020-10-12 15:41:47,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 220 transitions. [2020-10-12 15:41:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:41:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:47,053 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:47,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-12 15:41:47,053 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash -884299409, now seen corresponding path program 33 times [2020-10-12 15:41:47,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:47,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407726463] [2020-10-12 15:41:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:49,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:49,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:41:49,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:41:49,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2842 [2020-10-12 15:41:49,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:49,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:49,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:49,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:41:49,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:50,393 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 67 [2020-10-12 15:41:50,582 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2020-10-12 15:41:50,930 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 75 [2020-10-12 15:41:51,091 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-12 15:41:51,241 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-12 15:41:51,499 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-12 15:41:51,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:51,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:51,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:51,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:51,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:51,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:51,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:51,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:51,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407726463] [2020-10-12 15:41:51,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:51,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:41:51,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372675872] [2020-10-12 15:41:51,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:41:51,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:41:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:51,760 INFO L87 Difference]: Start difference. First operand 180 states and 220 transitions. Second operand 19 states. [2020-10-12 15:41:52,216 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-12 15:41:52,421 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-10-12 15:41:53,099 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-10-12 15:41:53,379 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-12 15:41:53,543 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-12 15:41:53,953 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-12 15:41:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:54,364 INFO L93 Difference]: Finished difference Result 249 states and 299 transitions. [2020-10-12 15:41:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:41:54,365 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-12 15:41:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:54,366 INFO L225 Difference]: With dead ends: 249 [2020-10-12 15:41:54,366 INFO L226 Difference]: Without dead ends: 247 [2020-10-12 15:41:54,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:41:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-12 15:41:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 194. [2020-10-12 15:41:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 15:41:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 240 transitions. [2020-10-12 15:41:54,438 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 240 transitions. Word has length 44 [2020-10-12 15:41:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:54,438 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 240 transitions. [2020-10-12 15:41:54,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:41:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 240 transitions. [2020-10-12 15:41:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:41:54,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:54,439 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:54,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-12 15:41:54,439 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1624569477, now seen corresponding path program 16 times [2020-10-12 15:41:54,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:54,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879062918] [2020-10-12 15:41:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:54,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:55,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:41:55,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0