/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/sll2n_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:56:15,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:56:15,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:56:15,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:56:15,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:56:15,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:56:15,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:56:15,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:56:15,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:56:15,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:56:15,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:56:15,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:56:15,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:56:15,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:56:15,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:56:15,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:56:15,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:56:15,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:56:15,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:56:15,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:56:15,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:56:15,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:56:15,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:56:15,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:56:15,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:56:15,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:56:15,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:56:15,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:56:15,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:56:15,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:56:15,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:56:15,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:56:15,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:56:15,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:56:15,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:56:15,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:56:15,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:56:15,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:56:15,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:56:15,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:56:15,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:56:15,896 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 15:56:15,946 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:56:15,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:56:15,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:56:15,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:56:15,950 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:56:15,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:56:15,951 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:56:15,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:56:15,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:56:15,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:56:15,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:56:15,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:56:15,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:56:15,953 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:56:15,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:56:15,954 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:56:15,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:56:15,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:56:15,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:56:15,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:56:15,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:56:15,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:56:15,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:56:15,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:56:15,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:56:15,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:56:15,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:56:15,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:56:15,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:56:15,956 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 15:56:16,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:56:16,361 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:56:16,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:56:16,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:56:16,367 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:56:16,368 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_equal.i [2020-10-12 15:56:16,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b25df58d7/cc32834cabe54f0baa8dfc1c0b66d781/FLAGecdb08a2d [2020-10-12 15:56:17,172 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:56:17,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_append_equal.i [2020-10-12 15:56:17,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b25df58d7/cc32834cabe54f0baa8dfc1c0b66d781/FLAGecdb08a2d [2020-10-12 15:56:17,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b25df58d7/cc32834cabe54f0baa8dfc1c0b66d781 [2020-10-12 15:56:17,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:56:17,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:56:17,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:56:17,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:56:17,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:56:17,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:56:17" (1/1) ... [2020-10-12 15:56:17,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1edca977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:17, skipping insertion in model container [2020-10-12 15:56:17,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:56:17" (1/1) ... [2020-10-12 15:56:17,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:56:17,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:56:17,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:56:17,974 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:56:18,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:56:18,096 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:56:18,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18 WrapperNode [2020-10-12 15:56:18,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:56:18,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:56:18,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:56:18,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:56:18,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (1/1) ... [2020-10-12 15:56:18,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (1/1) ... [2020-10-12 15:56:18,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (1/1) ... [2020-10-12 15:56:18,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (1/1) ... [2020-10-12 15:56:18,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (1/1) ... [2020-10-12 15:56:18,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (1/1) ... [2020-10-12 15:56:18,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (1/1) ... [2020-10-12 15:56:18,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:56:18,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:56:18,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:56:18,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:56:18,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (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 15:56:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:56:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:56:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:56:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:56:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:56:18,255 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-12 15:56:18,256 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-12 15:56:18,257 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-12 15:56:18,257 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2020-10-12 15:56:18,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:56:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:56:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:56:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:56:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:56:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:56:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:56:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:56:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:56:18,259 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:56:18,259 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:56:18,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:56:18,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:56:18,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:56:18,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:56:18,261 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:56:18,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:56:18,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:56:18,263 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:56:18,264 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:56:18,265 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:56:18,265 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:56:18,265 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:56:18,265 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:56:18,265 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:56:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:56:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:56:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:56:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:56:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:56:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:56:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:56:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:56:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:56:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:56:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:56:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:56:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:56:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:56:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:56:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:56:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:56:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:56:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:56:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:56:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:56:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:56:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:56:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:56:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:56:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:56:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:56:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:56:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:56:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:56:18,276 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:56:18,277 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:56:18,277 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-12 15:56:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:56:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:56:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:56:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-12 15:56:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-12 15:56:18,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:56:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:56:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2020-10-12 15:56:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:56:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:56:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-12 15:56:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:56:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:56:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:56:18,679 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:56:18,881 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:56:18,881 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 15:56:18,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:56:18 BoogieIcfgContainer [2020-10-12 15:56:18,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:56:18,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:56:18,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:56:18,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:56:18,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:56:17" (1/3) ... [2020-10-12 15:56:18,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a97caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:56:18, skipping insertion in model container [2020-10-12 15:56:18,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:56:18" (2/3) ... [2020-10-12 15:56:18,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a97caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:56:18, skipping insertion in model container [2020-10-12 15:56:18,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:56:18" (3/3) ... [2020-10-12 15:56:18,897 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2020-10-12 15:56:18,908 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:56:18,918 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:56:18,932 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:56:18,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:56:18,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:56:18,956 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:56:18,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:56:18,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:56:18,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:56:18,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:56:18,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:56:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-12 15:56:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:56:18,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:18,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:18,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:18,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1667158038, now seen corresponding path program 1 times [2020-10-12 15:56:19,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:19,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438178761] [2020-10-12 15:56:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:19,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:19,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:20,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:20,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:56:20,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:20,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-12 15:56:20,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:56:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:56:20,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:56:20,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:20,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:20,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:20,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:20,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:20,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:56:20,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:20,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:20,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:20,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:20,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:20,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:20,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:20,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:20,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:20,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-12 15:56:20,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:56:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:56:20,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:56:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:20,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:20,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:20,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:20,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:20,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-12 15:56:20,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:56:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:56:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:20,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:20,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:20,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:20,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:20,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:20,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-12 15:56:20,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:56:20,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:21,054 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 15:56:21,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438178761] [2020-10-12 15:56:21,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:56:21,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 15:56:21,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815324836] [2020-10-12 15:56:21,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:56:21,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:21,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:56:21,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:56:21,085 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 14 states. [2020-10-12 15:56:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:22,146 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2020-10-12 15:56:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:56:22,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 15:56:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:22,163 INFO L225 Difference]: With dead ends: 115 [2020-10-12 15:56:22,163 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:56:22,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:56:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:56:22,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-12 15:56:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:56:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-12 15:56:22,232 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 29 [2020-10-12 15:56:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:22,233 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-12 15:56:22,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:56:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-12 15:56:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:56:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:22,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:22,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:56:22,237 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:22,238 INFO L82 PathProgramCache]: Analyzing trace with hash 937000280, now seen corresponding path program 1 times [2020-10-12 15:56:22,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:22,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779538342] [2020-10-12 15:56:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:22,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:22,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:56:23,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:56:23,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-12 15:56:23,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:56:23,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:56:23,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:56:23,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:23,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:56:23,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:23,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:56:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:23,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:56:23,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:23,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:56:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:23,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-12 15:56:23,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:56:23,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:23,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:56:23,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:23,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:23,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:23,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:23,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-12 15:56:23,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:56:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:23,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:56:23,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:56:23,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779538342] [2020-10-12 15:56:23,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:56:23,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 15:56:23,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164661069] [2020-10-12 15:56:23,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:56:23,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:23,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:56:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:56:23,567 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 12 states. [2020-10-12 15:56:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:23,890 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-12 15:56:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:56:23,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-12 15:56:23,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:23,892 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:56:23,892 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:56:23,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:56:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:56:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-10-12 15:56:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:56:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-12 15:56:23,905 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-10-12 15:56:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:23,906 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-12 15:56:23,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:56:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-12 15:56:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:56:23,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:23,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:23,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:56:23,909 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1484208003, now seen corresponding path program 1 times [2020-10-12 15:56:23,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:23,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875480051] [2020-10-12 15:56:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:24,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:24,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:25,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:25,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:56:25,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:56:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1990 [2020-10-12 15:56:25,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:56:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:56:25,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:26,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:26,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:26,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:26,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:26,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:56:26,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:26,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:26,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:26,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:26,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:26,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:26,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:26,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:56:26,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:56:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:56:26,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:26,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:56:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:26,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:26,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:26,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:26,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-12 15:56:26,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:56:26,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:26,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:26,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:28,286 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 83 [2020-10-12 15:56:28,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:28,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:28,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:28,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:28,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-12 15:56:28,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:28,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:56:28,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:28,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:28,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:28,643 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 15:56:28,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875480051] [2020-10-12 15:56:28,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:56:28,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-12 15:56:28,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552910674] [2020-10-12 15:56:28,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:56:28,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:28,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:56:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:56:28,646 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 19 states. [2020-10-12 15:56:29,545 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-12 15:56:30,321 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 15:56:30,877 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 15:56:31,534 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 15:56:32,097 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 15:56:32,661 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 15:56:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:32,682 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-12 15:56:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:56:32,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-10-12 15:56:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:32,688 INFO L225 Difference]: With dead ends: 72 [2020-10-12 15:56:32,689 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:56:32,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:56:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:56:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-12 15:56:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:56:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-12 15:56:32,705 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 31 [2020-10-12 15:56:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:32,705 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-12 15:56:32,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:56:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-12 15:56:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:56:32,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:32,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:32,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:56:32,708 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1484209677, now seen corresponding path program 1 times [2020-10-12 15:56:32,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:32,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569194780] [2020-10-12 15:56:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:32,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:32,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:32,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:56:32,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:32,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-12 15:56:32,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:32,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:32,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:32,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:32,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:32,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:32,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:32,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:56:32,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:32,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:32,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:32,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:32,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:32,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:32,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:32,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:32,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:32,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:32,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:56:32,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:56:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:56:32,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:32,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:56:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:32,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:32,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:32,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:32,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:32,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:56:32,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:32,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:32,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:56:32,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:32,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:32,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:32,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:32,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:32,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:32,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:56:32,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:32,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569194780] [2020-10-12 15:56:32,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:56:32,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:56:32,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18119318] [2020-10-12 15:56:32,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:56:32,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:56:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:56:32,909 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 7 states. [2020-10-12 15:56:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:33,111 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-12 15:56:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:56:33,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-12 15:56:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:33,113 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:56:33,113 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:56:33,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:56:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:56:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-12 15:56:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 15:56:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-12 15:56:33,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 31 [2020-10-12 15:56:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:33,134 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-12 15:56:33,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:56:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-12 15:56:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:56:33,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:33,139 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:33,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:56:33,139 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:33,140 INFO L82 PathProgramCache]: Analyzing trace with hash -777493550, now seen corresponding path program 1 times [2020-10-12 15:56:33,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:33,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484136492] [2020-10-12 15:56:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:33,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:33,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:34,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:35,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:38,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:56:38,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:56:38,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:56:38,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:56:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:56:38,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:38,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:38,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:38,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:38,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:38,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:56:38,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:38,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:38,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:38,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:38,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:38,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:38,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-12 15:56:38,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:56:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:38,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:38,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:38,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:38,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:38,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 15:56:38,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:38,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:38,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:38,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:38,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:56:38,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:38,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 15:56:38,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:38,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:56:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:38,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:38,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:38,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:38,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:38,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:38,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:38,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 15:56:38,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:38,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:56:38,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484136492] [2020-10-12 15:56:38,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:38,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:56:38,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819349649] [2020-10-12 15:56:38,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:56:38,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:56:38,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:56:38,841 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 18 states. [2020-10-12 15:56:39,656 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-12 15:56:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:39,799 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-12 15:56:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:56:39,799 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-12 15:56:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:39,801 INFO L225 Difference]: With dead ends: 50 [2020-10-12 15:56:39,802 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 15:56:39,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:56:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 15:56:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 15:56:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:56:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 15:56:39,810 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 40 [2020-10-12 15:56:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:39,811 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 15:56:39,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:56:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 15:56:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:56:39,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:39,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:39,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:56:39,813 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash -771302862, now seen corresponding path program 1 times [2020-10-12 15:56:39,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:39,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281277681] [2020-10-12 15:56:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:39,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:39,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:40,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:40,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:56:40,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:56:40,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-12 15:56:40,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:56:40,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:40,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:56:40,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:40,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:40,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:40,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:40,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:40,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:40,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:56:40,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:40,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:40,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:40,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:40,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:40,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:40,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 15:56:40,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:56:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:56:40,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:41,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:41,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:41,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:41,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:41,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:41,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 15:56:41,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:41,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:41,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:41,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:56:41,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:41,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:41,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:41,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:41,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:41,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:41,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-12 15:56:41,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:56:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:41,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:56:41,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:41,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:41,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:41,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:41,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:41,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:41,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 15:56:41,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:41,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:41,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:41,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:41,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:42,006 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-12 15:56:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:42,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281277681] [2020-10-12 15:56:42,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:42,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:56:42,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071849337] [2020-10-12 15:56:42,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:56:42,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:56:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:56:42,033 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 22 states. [2020-10-12 15:56:43,580 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-12 15:56:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:43,961 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-12 15:56:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:56:43,962 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-10-12 15:56:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:43,965 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:56:43,965 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:56:43,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:56:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:56:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-12 15:56:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 15:56:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-12 15:56:43,983 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 41 [2020-10-12 15:56:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:43,984 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-12 15:56:43,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:56:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-12 15:56:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:56:43,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:43,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:43,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:56:43,989 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:43,990 INFO L82 PathProgramCache]: Analyzing trace with hash -771304536, now seen corresponding path program 1 times [2020-10-12 15:56:43,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:43,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514696982] [2020-10-12 15:56:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:44,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:44,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:44,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:44,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:44,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:45,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:45,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:46,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:49,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:56:49,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:56:49,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:56:49,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:56:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:56:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:49,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:49,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:49,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:49,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:56:49,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:49,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:49,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:49,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:49,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:49,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:49,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-12 15:56:49,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:49,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:56:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:49,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:49,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:49,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:49,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:49,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:49,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:56:49,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:49,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:56:49,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:49,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:50,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:50,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:50,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:56:50,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-12 15:56:50,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:50,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:56:50,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:50,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:56:50,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:50,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:50,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:50,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:50,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:50,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:50,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 15:56:50,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:50,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:56:50,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:50,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:50,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:50,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514696982] [2020-10-12 15:56:50,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:50,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:56:50,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397390349] [2020-10-12 15:56:50,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:56:50,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:50,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:56:50,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:56:50,421 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 21 states. [2020-10-12 15:56:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:51,531 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-12 15:56:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:56:51,532 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-12 15:56:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:51,533 INFO L225 Difference]: With dead ends: 60 [2020-10-12 15:56:51,533 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:56:51,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:56:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:56:51,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-12 15:56:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 15:56:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-12 15:56:51,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 41 [2020-10-12 15:56:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:51,552 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-12 15:56:51,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:56:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-12 15:56:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:56:51,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:51,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:51,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:56:51,557 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:51,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1807338189, now seen corresponding path program 1 times [2020-10-12 15:56:51,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:51,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471466641] [2020-10-12 15:56:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:54,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3156 [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:56:54,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:54,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:54,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:54,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:54,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:54,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:56:54,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:54,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:54,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:54,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:54,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:55,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:55,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:55,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:55,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:55,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 15:56:55,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:56:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:56:55,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:55,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:55,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:55,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:55,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:56:55,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:56:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:56:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:55,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:56:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:55,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:55,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:55,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:56:55,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:55,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-12 15:56:55,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:56:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:56:55,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:56,613 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 139 [2020-10-12 15:56:56,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:56,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:56,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:56,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:56,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 15:56:56,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:56,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:56:56,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:56,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:56,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:56,955 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-12 15:56:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:56:56,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471466641] [2020-10-12 15:56:56,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:56,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:56:56,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275476444] [2020-10-12 15:56:56,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:56:56,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:56:56,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:56:56,978 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 24 states. [2020-10-12 15:56:57,583 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 15:56:58,525 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 15:56:59,339 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-12 15:56:59,975 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 15:57:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:01,693 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-10-12 15:57:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:57:01,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2020-10-12 15:57:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:01,696 INFO L225 Difference]: With dead ends: 83 [2020-10-12 15:57:01,696 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:57:01,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:57:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:57:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-12 15:57:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:57:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-12 15:57:01,715 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 43 [2020-10-12 15:57:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:01,716 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-12 15:57:01,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:57:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-12 15:57:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:57:01,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:01,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:01,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:57:01,718 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1807336515, now seen corresponding path program 1 times [2020-10-12 15:57:01,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:01,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913831799] [2020-10-12 15:57:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:01,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:02,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:04,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:04,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:57:04,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:57:04,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2931 [2020-10-12 15:57:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:57:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:57:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:04,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:04,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:04,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:04,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:04,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:04,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:04,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:04,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:04,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:04,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:04,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:04,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:04,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:04,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:04,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:04,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:04,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 15:57:04,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:04,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:04,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:04,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:04,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:04,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:04,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:04,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:04,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:04,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:57:04,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:04,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:04,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:05,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:05,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:05,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:05,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-12 15:57:05,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:05,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:57:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:05,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:57:05,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:05,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:05,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:05,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:05,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:05,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:05,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:57:05,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:57:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:05,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:05,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913831799] [2020-10-12 15:57:05,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:05,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:57:05,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486032677] [2020-10-12 15:57:05,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:57:05,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:57:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:57:05,516 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 23 states. [2020-10-12 15:57:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:06,826 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-12 15:57:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:57:06,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-12 15:57:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:06,831 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:57:06,831 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 15:57:06,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:57:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 15:57:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-12 15:57:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 15:57:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-10-12 15:57:06,852 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 43 [2020-10-12 15:57:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:06,852 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-10-12 15:57:06,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:57:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-10-12 15:57:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:57:06,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:06,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:06,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:57:06,854 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash 526761325, now seen corresponding path program 1 times [2020-10-12 15:57:06,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:06,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158040221] [2020-10-12 15:57:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:06,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:57:07,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:57:07,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 912 [2020-10-12 15:57:07,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:57:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:57:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:07,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:07,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:07,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:07,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:07,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:07,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:07,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:07,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:07,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-12 15:57:07,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:07,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:57:07,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:07,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:57:07,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:08,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:08,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:08,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:08,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:08,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:57:08,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:08,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:08,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:08,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:57:08,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:08,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:08,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:08,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:57:08,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:08,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-12 15:57:08,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:57:08,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:57:08,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:08,634 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-12 15:57:08,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:08,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:08,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:08,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:57:08,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:08,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:09,339 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-12 15:57:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:09,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158040221] [2020-10-12 15:57:09,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:09,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:57:09,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455219610] [2020-10-12 15:57:09,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:57:09,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:09,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:57:09,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:57:09,359 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 23 states. [2020-10-12 15:57:10,167 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 15:57:10,822 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-12 15:57:11,145 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-12 15:57:11,508 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-12 15:57:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:12,146 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-10-12 15:57:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:57:12,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-12 15:57:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:12,149 INFO L225 Difference]: With dead ends: 86 [2020-10-12 15:57:12,149 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 15:57:12,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:57:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 15:57:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-10-12 15:57:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:57:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-12 15:57:12,162 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 43 [2020-10-12 15:57:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:12,163 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-12 15:57:12,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:57:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-12 15:57:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:57:12,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:12,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:12,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:57:12,165 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 526759651, now seen corresponding path program 1 times [2020-10-12 15:57:12,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:12,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046725238] [2020-10-12 15:57:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:12,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:12,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:13,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:16,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:17,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:57:17,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:57:17,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:57:17,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:17,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:57:17,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:17,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:57:17,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:17,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:17,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:17,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:17,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:17,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:17,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:17,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:17,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:17,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:17,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:17,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:17,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:17,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:17,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-12 15:57:17,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:17,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:57:17,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:17,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:17,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:17,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:17,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:17,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:17,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:57:17,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:57:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:57:17,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:17,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:17,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:17,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:57:17,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:57:17,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-12 15:57:17,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:57:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:17,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:57:17,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:18,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:18,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:18,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:18,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:18,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 15:57:18,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:18,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:18,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:18,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:18,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:18,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046725238] [2020-10-12 15:57:18,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:18,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:57:18,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047792983] [2020-10-12 15:57:18,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:57:18,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:57:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:57:18,484 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 23 states. [2020-10-12 15:57:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:19,483 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2020-10-12 15:57:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:57:19,484 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-12 15:57:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:19,485 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:57:19,485 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 15:57:19,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:57:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 15:57:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-12 15:57:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:57:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-12 15:57:19,498 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 43 [2020-10-12 15:57:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:19,498 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-12 15:57:19,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:57:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-12 15:57:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:57:19,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:19,500 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:19,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:57:19,500 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1685258408, now seen corresponding path program 2 times [2020-10-12 15:57:19,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:19,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101420561] [2020-10-12 15:57:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:19,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:20,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:22,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:22,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:57:22,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:57:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3143 [2020-10-12 15:57:22,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:57:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:57:22,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:22,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:22,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:22,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:22,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:22,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:22,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:22,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:22,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:22,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:22,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:22,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:22,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:22,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 15:57:22,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:22,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:22,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:23,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:23,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:23,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:23,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:23,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:57:23,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:23,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:23,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:23,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:23,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:23,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:23,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:23,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-12 15:57:23,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:57:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:57:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:23,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:23,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:23,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:23,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101420561] [2020-10-12 15:57:23,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:23,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:57:23,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656044446] [2020-10-12 15:57:23,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:57:23,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:57:23,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:57:23,820 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 25 states. [2020-10-12 15:57:24,248 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-12 15:57:24,879 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-12 15:57:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:25,619 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-12 15:57:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:57:25,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2020-10-12 15:57:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:25,622 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:57:25,622 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 15:57:25,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=1358, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:57:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 15:57:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-12 15:57:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:57:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-10-12 15:57:25,635 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 45 [2020-10-12 15:57:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:25,636 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-10-12 15:57:25,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:57:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-10-12 15:57:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:57:25,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:25,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:25,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:57:25,638 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1685256734, now seen corresponding path program 2 times [2020-10-12 15:57:25,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:25,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518377751] [2020-10-12 15:57:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:57:25,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:57:25,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 15:57:25,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:57:25,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:57:25,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:57:25,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:25,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:25,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:25,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:57:25,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:57:25,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:25,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:25,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:57:25,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:57:25,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:25,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:57:25,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:25,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:25,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:25,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:25,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:25,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:25,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:26,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:57:26,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:26,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:26,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 15:57:26,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518377751] [2020-10-12 15:57:26,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:26,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:57:26,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986254557] [2020-10-12 15:57:26,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:57:26,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:26,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:57:26,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:57:26,008 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 12 states. [2020-10-12 15:57:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:26,397 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-12 15:57:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:57:26,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-12 15:57:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:26,399 INFO L225 Difference]: With dead ends: 98 [2020-10-12 15:57:26,400 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 15:57:26,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:57:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 15:57:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2020-10-12 15:57:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:57:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-12 15:57:26,414 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 45 [2020-10-12 15:57:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:26,414 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-12 15:57:26,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:57:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-12 15:57:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:57:26,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:26,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:26,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:57:26,417 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -588462914, now seen corresponding path program 1 times [2020-10-12 15:57:26,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:26,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274162151] [2020-10-12 15:57:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:26,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:27,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:27,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:28,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:30,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:30,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:57:30,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:57:30,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3842 [2020-10-12 15:57:30,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:30,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:57:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:57:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:30,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:30,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:30,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:30,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:30,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:30,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:30,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:30,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:30,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:30,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:30,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:30,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 15:57:30,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:30,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:30,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:30,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:30,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:30,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:30,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:30,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:30,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:30,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:30,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:30,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:30,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:30,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:57:30,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:57:30,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 15:57:30,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:57:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:57:30,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:31,238 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-12 15:57:31,643 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-10-12 15:57:31,998 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-10-12 15:57:32,342 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-12 15:57:32,783 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-12 15:57:32,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:32,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:32,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:32,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:57:33,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274162151] [2020-10-12 15:57:33,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:33,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:57:33,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90872334] [2020-10-12 15:57:33,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:57:33,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:33,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:57:33,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:57:33,090 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 26 states. [2020-10-12 15:57:34,884 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 15:57:35,391 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2020-10-12 15:57:36,133 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 106 [2020-10-12 15:57:36,652 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-10-12 15:57:36,980 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-10-12 15:57:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:37,726 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-12 15:57:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:57:37,727 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-12 15:57:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:37,729 INFO L225 Difference]: With dead ends: 96 [2020-10-12 15:57:37,730 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 15:57:37,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=181, Invalid=1889, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:57:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 15:57:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-12 15:57:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:57:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-10-12 15:57:37,744 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 45 [2020-10-12 15:57:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:37,744 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-10-12 15:57:37,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:57:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-10-12 15:57:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:57:37,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:37,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:37,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:57:37,745 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1869038104, now seen corresponding path program 2 times [2020-10-12 15:57:37,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:37,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989672894] [2020-10-12 15:57:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:37,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:57:38,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:57:38,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-12 15:57:38,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:57:38,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:38,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:57:38,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:38,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:38,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:38,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:38,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:38,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:38,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:38,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:38,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:57:38,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:57:38,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:38,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:57:38,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:38,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:38,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:57:38,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:57:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:57:38,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:38,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 15:57:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:38,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:38,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:38,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:57:38,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:38,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-12 15:57:38,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:38,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:57:38,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:38,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:57:38,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:39,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:39,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:39,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:39,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:57:39,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:39,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:57:39,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989672894] [2020-10-12 15:57:39,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:39,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:57:39,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737593150] [2020-10-12 15:57:39,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:57:39,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:39,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:57:39,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:57:39,341 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 20 states. [2020-10-12 15:57:40,263 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-12 15:57:40,477 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-12 15:57:40,751 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-12 15:57:40,952 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-12 15:57:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:41,164 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2020-10-12 15:57:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:57:41,165 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-12 15:57:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:41,167 INFO L225 Difference]: With dead ends: 83 [2020-10-12 15:57:41,167 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 15:57:41,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:57:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 15:57:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-12 15:57:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:57:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-12 15:57:41,178 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 45 [2020-10-12 15:57:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:41,178 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-12 15:57:41,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:57:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-12 15:57:41,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:57:41,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:41,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:41,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:57:41,180 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -439742814, now seen corresponding path program 3 times [2020-10-12 15:57:41,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:41,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83786426] [2020-10-12 15:57:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:41,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:41,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:44,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:44,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 15:57:44,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:57:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3146 [2020-10-12 15:57:44,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:57:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 15:57:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:57:44,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:44,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:44,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:44,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:44,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:44,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:57:44,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:44,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:44,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:44,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:44,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:44,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:57:44,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 15:57:44,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:57:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:57:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:44,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:44,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:44,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:44,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:44,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:57:44,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:44,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:44,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:44,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:57:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:44,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:44,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:44,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:44,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:44,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:57:44,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:57:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:57:44,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:44,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:57:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:44,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:44,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:44,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:57:44,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:44,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 15:57:44,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:44,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:57:44,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:44,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:57:44,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:45,224 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-12 15:57:45,378 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-12 15:57:45,668 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-12 15:57:45,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:45,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:45,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:45,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:45,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 15:57:45,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:45,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:57:45,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:45,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:45,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:46,159 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 15:57:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 15:57:46,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83786426] [2020-10-12 15:57:46,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:46,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:57:46,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638693098] [2020-10-12 15:57:46,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:57:46,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:57:46,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:57:46,178 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 23 states. [2020-10-12 15:57:46,679 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-12 15:57:47,453 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-12 15:57:47,740 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-12 15:57:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:48,338 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-12 15:57:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:57:48,339 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-12 15:57:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:48,340 INFO L225 Difference]: With dead ends: 69 [2020-10-12 15:57:48,341 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 15:57:48,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:57:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 15:57:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-12 15:57:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:57:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-12 15:57:48,353 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 52 [2020-10-12 15:57:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:48,354 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-12 15:57:48,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:57:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-12 15:57:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:57:48,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:48,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:48,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:57:48,356 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1720319678, now seen corresponding path program 3 times [2020-10-12 15:57:48,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:48,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337816621] [2020-10-12 15:57:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:48,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:49,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 15:57:49,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:49,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:57:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:49,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:49,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:49,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:57:49,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:49,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:57:49,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:49,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:57:49,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:49,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:57:49,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:49,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:57:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:49,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:49,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:49,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:57:49,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:49,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 15:57:49,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:49,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:57:49,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:49,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:57:49,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:49,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:57:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:49,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:49,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:49,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:49,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:57:49,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:57:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:57:49,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:49,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:57:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:49,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:49,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:49,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:57:49,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:57:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:57:49,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:49,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:57:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:49,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:49,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:49,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:57:49,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:49,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-12 15:57:49,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:57:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:57:49,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:50,454 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-12 15:57:51,107 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2020-10-12 15:57:53,028 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 185 DAG size of output: 98 [2020-10-12 15:57:53,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:57:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:53,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:53,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:57:53,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:57:53,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:57:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 15:57:53,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:57:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:57:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:57:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:57:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:57:53,595 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-12 15:57:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:57:53,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337816621] [2020-10-12 15:57:53,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:57:53,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:57:53,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037123026] [2020-10-12 15:57:53,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:57:53,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:57:53,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:57:53,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:57:53,625 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 27 states. [2020-10-12 15:57:55,574 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-12 15:57:56,031 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-12 15:57:56,570 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-12 15:57:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:57:57,442 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-10-12 15:57:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:57:57,444 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-10-12 15:57:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:57:57,445 INFO L225 Difference]: With dead ends: 73 [2020-10-12 15:57:57,445 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:57:57,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:57:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:57:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2020-10-12 15:57:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:57:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-12 15:57:57,457 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 52 [2020-10-12 15:57:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:57:57,457 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-12 15:57:57,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:57:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-12 15:57:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:57:57,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:57:57,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:57:57,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:57:57,458 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:57:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:57:57,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1720321352, now seen corresponding path program 2 times [2020-10-12 15:57:57,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:57:57,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70793036] [2020-10-12 15:57:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:57:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:57:57,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:57,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:57,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:57,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:58,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:58,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:59,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:57:59,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:00,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:01,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 15:58:02,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:58:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:58:02,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:58:02,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:58:02,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 15:58:02,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:58:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:58:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:58:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:58:02,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-12 15:58:02,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:58:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:58:02,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:58:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:02,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 15:58:02,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:58:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:58:02,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:58:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:02,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:02,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:02,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:58:02,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:58:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:58:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:02,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:58:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:02,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:03,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:03,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:03,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:58:03,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:58:03,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-12 15:58:03,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:03,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:58:03,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:03,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:58:03,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:03,785 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-12 15:58:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:58:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:03,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:03,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:03,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:03,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:03,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:58:03,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:58:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:03,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:58:04,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70793036] [2020-10-12 15:58:04,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:58:04,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:58:04,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984374252] [2020-10-12 15:58:04,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:58:04,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:58:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:58:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:58:04,039 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 26 states. [2020-10-12 15:58:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:58:05,014 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-12 15:58:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:58:05,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-10-12 15:58:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:58:05,017 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:58:05,017 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:58:05,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:58:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:58:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2020-10-12 15:58:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:58:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-12 15:58:05,028 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 52 [2020-10-12 15:58:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:58:05,029 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-12 15:58:05,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:58:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-12 15:58:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:58:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:58:05,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:58:05,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:58:05,030 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:58:05,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:58:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1686004557, now seen corresponding path program 3 times [2020-10-12 15:58:05,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:58:05,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607420724] [2020-10-12 15:58:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:58:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:05,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:05,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:58:05,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:58:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:05,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:05,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:05,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:58:05,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:05,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:58:05,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:05,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:58:05,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:05,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:58:05,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:05,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:58:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:05,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:06,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:06,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:06,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:58:06,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:58:06,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-12 15:58:06,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:06,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:58:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:58:06,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:58:06,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:58:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:06,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:06,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:06,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:06,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:06,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 15:58:06,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:06,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:58:06,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:06,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:58:06,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:58:06,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:58:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:06,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:06,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:06,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:06,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:06,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:58:06,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:06,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:58:06,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:06,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:58:06,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:58:06,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:58:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:06,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:06,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:06,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:58:06,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:06,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-12 15:58:06,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:06,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:58:06,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:06,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:58:06,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:58:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:58:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:07,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:07,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:07,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:07,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 15:58:07,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:07,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:58:07,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:07,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:07,461 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-12 15:58:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 15:58:07,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607420724] [2020-10-12 15:58:07,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:58:07,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:58:07,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520160990] [2020-10-12 15:58:07,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:58:07,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:58:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:58:07,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:58:07,477 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 23 states. [2020-10-12 15:58:08,603 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-12 15:58:08,910 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-12 15:58:09,228 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-12 15:58:09,555 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-10-12 15:58:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:58:09,707 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-12 15:58:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:58:09,708 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-12 15:58:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:58:09,709 INFO L225 Difference]: With dead ends: 66 [2020-10-12 15:58:09,709 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:58:09,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:58:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:58:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-12 15:58:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:58:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-12 15:58:09,719 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 54 [2020-10-12 15:58:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:58:09,720 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-12 15:58:09,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:58:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-12 15:58:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:58:09,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:58:09,721 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:58:09,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:58:09,721 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:58:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:58:09,722 INFO L82 PathProgramCache]: Analyzing trace with hash 335244765, now seen corresponding path program 1 times [2020-10-12 15:58:09,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:58:09,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525838716] [2020-10-12 15:58:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:58:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:10,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:11,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:11,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:58:11,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:58:11,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1591 [2020-10-12 15:58:11,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 15:58:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:58:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:58:11,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:11,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:58:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:11,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:11,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:11,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:58:11,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:11,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:58:11,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:11,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:58:11,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:11,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:58:11,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:11,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:58:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:11,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:11,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:11,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:58:11,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-12 15:58:11,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:58:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:58:11,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:12,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:58:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:12,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:12,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:12,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:12,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:12,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:58:12,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:12,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:58:12,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:58:12,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:12,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:58:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:12,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:12,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:12,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:12,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:58:12,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:58:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:12,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:12,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:58:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:12,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:12,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:12,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:58:12,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-12 15:58:12,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:58:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:58:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:13,060 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-12 15:58:13,490 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:58:14,153 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2020-10-12 15:58:14,986 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 92 [2020-10-12 15:58:14,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:58:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:14,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:15,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:15,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:15,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:15,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 15:58:15,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:15,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:58:15,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:15,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:15,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:15,547 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-12 15:58:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:58:15,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525838716] [2020-10-12 15:58:15,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:58:15,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:58:15,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090075629] [2020-10-12 15:58:15,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:58:15,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:58:15,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:58:15,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:58:15,579 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 29 states. [2020-10-12 15:58:16,775 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-12 15:58:18,259 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-12 15:58:18,971 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-12 15:58:19,594 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2020-10-12 15:58:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:58:20,384 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-12 15:58:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:58:20,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2020-10-12 15:58:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:58:20,386 INFO L225 Difference]: With dead ends: 63 [2020-10-12 15:58:20,386 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 15:58:20,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:58:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 15:58:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-12 15:58:20,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:58:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-12 15:58:20,397 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 54 [2020-10-12 15:58:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:58:20,398 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-12 15:58:20,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 15:58:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-12 15:58:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:58:20,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:58:20,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:58:20,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:58:20,399 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:58:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:58:20,399 INFO L82 PathProgramCache]: Analyzing trace with hash -945332099, now seen corresponding path program 4 times [2020-10-12 15:58:20,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:58:20,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685572740] [2020-10-12 15:58:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:58:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:20,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:21,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:58:21,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:21,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:58:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:21,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:21,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:21,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:58:21,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:21,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:58:21,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:21,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:58:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:58:21,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:21,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:58:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:21,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:22,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:58:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:22,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:58:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:22,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:22,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:22,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 15:58:22,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:58:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:58:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:22,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:58:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:22,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:22,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:22,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:22,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:22,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-12 15:58:22,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:58:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:22,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:58:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:22,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:22,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:22,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:58:22,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:22,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 15:58:22,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:58:22,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:58:22,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:23,965 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-12 15:58:24,747 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-12 15:58:25,635 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 110 [2020-10-12 15:58:26,979 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 104 [2020-10-12 15:58:26,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:58:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:27,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:27,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:27,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 15:58:27,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:58:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:28,022 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 48 [2020-10-12 15:58:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:58:28,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685572740] [2020-10-12 15:58:28,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:58:28,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:58:28,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652848599] [2020-10-12 15:58:28,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:58:28,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:58:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:58:28,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:58:28,064 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 28 states. [2020-10-12 15:58:29,281 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-12 15:58:29,588 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-12 15:58:30,908 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-12 15:58:31,333 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2020-10-12 15:58:31,856 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-12 15:58:32,413 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 80 [2020-10-12 15:58:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:58:33,491 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-12 15:58:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:58:33,493 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-10-12 15:58:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:58:33,494 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:58:33,494 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:58:33,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=181, Invalid=1889, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:58:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:58:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-10-12 15:58:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:58:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-12 15:58:33,514 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 54 [2020-10-12 15:58:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:58:33,514 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-12 15:58:33,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:58:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-12 15:58:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:58:33,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:58:33,515 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:58:33,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:58:33,515 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:58:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:58:33,516 INFO L82 PathProgramCache]: Analyzing trace with hash -945333773, now seen corresponding path program 3 times [2020-10-12 15:58:33,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:58:33,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068619596] [2020-10-12 15:58:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:58:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:33,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:33,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:34,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:34,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:34,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:38,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:38,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:58:38,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:58:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:58:38,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 15:58:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:58:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 15:58:38,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:38,719 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-12 15:58:38,897 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-12 15:58:38,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:58:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:38,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:38,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:38,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:58:38,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:38,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:58:38,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:38,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:58:38,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:38,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:58:38,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:38,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:58:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:39,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:39,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:39,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:58:39,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:58:39,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-12 15:58:39,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:58:39,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:39,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:58:39,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:58:39,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:58:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:39,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:39,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:39,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:39,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 15:58:39,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:39,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:58:39,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:58:39,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:58:39,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:39,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:58:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:39,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:39,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:39,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:39,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:39,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:58:39,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:39,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:58:39,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:39,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:39,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:58:40,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:58:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:40,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:40,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:40,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:40,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:40,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:58:40,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:58:40,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-12 15:58:40,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:40,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:58:40,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:58:40,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:58:43,512 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 233 DAG size of output: 137 [2020-10-12 15:58:47,188 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 250 DAG size of output: 149 [2020-10-12 15:58:47,746 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-12 15:58:48,281 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-12 15:58:48,812 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2020-10-12 15:58:49,320 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-10-12 15:58:49,757 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2020-10-12 15:58:49,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:58:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:58:49,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:58:49,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:58:49,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:58:49,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:58:49,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-12 15:58:49,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:58:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:58:49,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:58:49,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:58:49,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:03,355 WARN L193 SmtUtils]: Spent 9.46 s on a formula simplification. DAG size of input: 805 DAG size of output: 129 [2020-10-12 15:59:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:59:03,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068619596] [2020-10-12 15:59:03,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:03,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:59:03,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986009725] [2020-10-12 15:59:03,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:59:03,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:03,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:59:03,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:59:03,432 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 29 states. [2020-10-12 15:59:05,639 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2020-10-12 15:59:07,935 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 140 DAG size of output: 140 [2020-10-12 15:59:10,678 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 154 DAG size of output: 154 [2020-10-12 15:59:13,185 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 149 DAG size of output: 149 [2020-10-12 15:59:14,929 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 15:59:15,193 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-12 15:59:19,627 WARN L193 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 214 DAG size of output: 139 [2020-10-12 15:59:23,765 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 263 DAG size of output: 155 [2020-10-12 15:59:30,369 WARN L193 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 327 DAG size of output: 217 [2020-10-12 15:59:35,187 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 267 DAG size of output: 159 [2020-10-12 15:59:41,897 WARN L193 SmtUtils]: Spent 5.82 s on a formula simplification. DAG size of input: 278 DAG size of output: 192 [2020-10-12 15:59:52,410 WARN L193 SmtUtils]: Spent 8.93 s on a formula simplification. DAG size of input: 305 DAG size of output: 220 [2020-10-12 15:59:59,626 WARN L193 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 288 DAG size of output: 209 [2020-10-12 16:00:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:01,317 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-12 16:00:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:00:01,323 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2020-10-12 16:00:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:01,324 INFO L225 Difference]: With dead ends: 84 [2020-10-12 16:00:01,325 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 16:00:01,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 74.1s TimeCoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:00:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 16:00:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-12 16:00:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:00:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-12 16:00:01,345 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 54 [2020-10-12 16:00:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:01,345 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-12 16:00:01,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:00:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-12 16:00:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:00:01,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:01,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:01,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:00:01,348 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash 47718328, now seen corresponding path program 2 times [2020-10-12 16:00:01,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:01,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515304950] [2020-10-12 16:00:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:01,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:01,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:04,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:04,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:00:04,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:04,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3399 [2020-10-12 16:00:04,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:04,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:00:04,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:00:04,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 16:00:04,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:05,129 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-12 16:00:05,306 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-10-12 16:00:05,443 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-10-12 16:00:05,596 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-10-12 16:00:05,728 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2020-10-12 16:00:05,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:05,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:05,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:05,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:05,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:00:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:05,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:06,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:06,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:00:06,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:06,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-12 16:00:06,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:00:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:00:06,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:06,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 16:00:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:06,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:06,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:06,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 16:00:06,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:06,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 16:00:06,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:00:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:00:06,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:06,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 16:00:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:06,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:06,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:06,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 16:00:06,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:06,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 16:00:06,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:00:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 16:00:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:00:06,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:07,282 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-12 16:00:07,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 16:00:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:07,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:07,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:00:07,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:07,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:00:07,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:07,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:00:07,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 16:00:07,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:00:07,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:07,874 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-12 16:00:08,151 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-12 16:00:13,081 WARN L193 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 179 DAG size of output: 167 [2020-10-12 16:00:13,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 16:00:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:13,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:13,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:13,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 16:00:13,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:13,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 16:00:13,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:13,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:00:13,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 16:00:13,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:00:13,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:13,940 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-10-12 16:00:14,353 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-12 16:00:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 16:00:14,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515304950] [2020-10-12 16:00:14,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:14,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:00:14,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904162459] [2020-10-12 16:00:14,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:00:14,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:14,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:00:14,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:00:14,393 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 30 states.