/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:44:24,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:44:24,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:44:24,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:44:24,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:44:24,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:44:24,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:44:24,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:44:24,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:44:24,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:44:24,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:44:24,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:44:24,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:44:24,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:44:24,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:44:24,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:44:24,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:44:24,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:44:24,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:44:24,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:44:24,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:44:24,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:44:24,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:44:24,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:44:24,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:44:24,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:44:24,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:44:24,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:44:24,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:44:24,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:44:24,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:44:24,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:44:24,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:44:24,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:44:24,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:44:24,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:44:24,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:44:24,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:44:24,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:44:24,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:44:24,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:44:24,816 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 [2020-10-28 14:44:24,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:44:24,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:44:24,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:44:24,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:44:24,872 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:44:24,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:44:24,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:44:24,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:44:24,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:44:24,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:44:24,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:44:24,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:44:24,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:44:24,873 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:44:24,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:44:24,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:44:24,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:44:24,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:44:24,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:44:24,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:44:24,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:44:24,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:44:24,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:44:24,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:44:24,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:44:24,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:44:24,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:44:24,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:44:24,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:44:24,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:44:25,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:44:25,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:44:25,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:44:25,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:44:25,280 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:44:25,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-28 14:44:25,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6db29f652/39cd04db5d55466aaaef791d8f9a2b38/FLAG17d4f1bd6 [2020-10-28 14:44:26,097 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:44:26,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-28 14:44:26,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6db29f652/39cd04db5d55466aaaef791d8f9a2b38/FLAG17d4f1bd6 [2020-10-28 14:44:26,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6db29f652/39cd04db5d55466aaaef791d8f9a2b38 [2020-10-28 14:44:26,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:44:26,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:44:26,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:44:26,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:44:26,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:44:26,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd2c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26, skipping insertion in model container [2020-10-28 14:44:26,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:44:26,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:44:26,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:44:26,738 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:44:26,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:44:26,871 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:44:26,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26 WrapperNode [2020-10-28 14:44:26,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:44:26,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:44:26,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:44:26,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:44:26,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:26,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (1/1) ... [2020-10-28 14:44:27,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:44:27,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:44:27,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:44:27,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:44:27,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (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 [2020-10-28 14:44:27,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:44:27,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:44:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:44:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:44:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:44:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-28 14:44:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-28 14:44:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-28 14:44:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:44:27,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:44:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:44:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:44:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:44:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:44:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:44:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:44:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:44:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:44:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:44:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:44:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:44:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:44:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:44:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:44:27,107 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:44:27,107 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:44:27,107 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:44:27,107 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:44:27,107 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:44:27,107 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:44:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:44:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:44:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:44:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:44:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:44:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-28 14:44:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-28 14:44:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-28 14:44:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:44:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:44:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:44:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:44:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:44:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:44:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:44:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:44:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:44:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:44:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:44:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:44:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:44:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:44:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:44:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:44:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:44:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:44:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:44:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:44:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:44:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:44:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:44:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:44:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:44:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:44:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:44:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:44:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:44:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:44:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:44:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:44:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:44:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:44:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:44:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:44:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:44:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:44:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:44:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:44:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:44:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:44:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:44:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:44:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:44:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:44:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:44:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:44:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:44:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:44:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:44:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:44:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:44:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:44:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:44:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:44:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:44:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:44:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:44:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:44:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:44:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:44:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:44:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:44:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:44:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:44:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:44:27,125 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:44:27,125 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:44:27,125 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:44:27,125 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:44:27,125 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:44:27,125 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:44:27,125 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:44:27,126 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:44:27,126 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:44:27,126 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:44:27,126 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:44:27,127 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:44:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:44:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:44:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:44:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:44:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:44:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:44:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:44:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:44:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:44:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:44:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:44:27,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:44:27,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:44:27,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:44:27,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:44:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:44:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:44:27,800 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:44:27,939 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:44:27,940 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:44:27,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:44:27 BoogieIcfgContainer [2020-10-28 14:44:27,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:44:27,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:44:27,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:44:27,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:44:27,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:44:26" (1/3) ... [2020-10-28 14:44:27,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236e2030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:44:27, skipping insertion in model container [2020-10-28 14:44:27,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:26" (2/3) ... [2020-10-28 14:44:27,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236e2030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:44:27, skipping insertion in model container [2020-10-28 14:44:27,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:44:27" (3/3) ... [2020-10-28 14:44:27,952 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-28 14:44:27,965 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:44:27,971 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:44:27,984 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:44:28,012 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:44:28,012 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:44:28,013 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:44:28,013 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:44:28,013 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:44:28,013 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:44:28,013 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:44:28,013 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:44:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-28 14:44:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:44:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:28,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:28,040 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash -58088377, now seen corresponding path program 1 times [2020-10-28 14:44:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:28,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558398629] [2020-10-28 14:44:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:28,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:28,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:28,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:28,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:44:28,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:28,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-28 14:44:28,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:28,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:28,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:28,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:44:28,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:28,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 14:44:28,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:28,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:28,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:28,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:28,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:44:28,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:28,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:28,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:28,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:28,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:28,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558398629] [2020-10-28 14:44:28,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:28,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:44:28,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925917148] [2020-10-28 14:44:28,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:44:28,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:44:28,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:44:28,662 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-28 14:44:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:28,770 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-10-28 14:44:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:44:28,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:44:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:28,782 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:44:28,782 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:44:28,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:44:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:44:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2020-10-28 14:44:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:44:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 14:44:28,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-10-28 14:44:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:28,825 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 14:44:28,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:44:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 14:44:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:44:28,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:28,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:28,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:44:28,827 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:28,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1462034142, now seen corresponding path program 1 times [2020-10-28 14:44:28,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:28,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456853701] [2020-10-28 14:44:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:28,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:28,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:28,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:44:28,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:28,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 14:44:28,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:28,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:28,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:44:28,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:28,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:44:28,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:44:29,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:29,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:29,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:29,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:29,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:29,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:44:29,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:29,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:29,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:29,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456853701] [2020-10-28 14:44:29,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:29,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:44:29,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151857827] [2020-10-28 14:44:29,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:44:29,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:29,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:44:29,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:44:29,049 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-28 14:44:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:29,170 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-28 14:44:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:44:29,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 14:44:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:29,172 INFO L225 Difference]: With dead ends: 29 [2020-10-28 14:44:29,172 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:44:29,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:44:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:44:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 14:44:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:44:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 14:44:29,181 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2020-10-28 14:44:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:29,181 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 14:44:29,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:44:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 14:44:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:44:29,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:29,182 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:29,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:44:29,183 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1616629271, now seen corresponding path program 1 times [2020-10-28 14:44:29,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:29,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614149427] [2020-10-28 14:44:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:29,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:29,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:44:29,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:29,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 14:44:29,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:29,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:29,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:44:29,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:44:29,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:44:29,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:29,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:29,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:29,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:29,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:29,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:44:29,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:29,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:29,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614149427] [2020-10-28 14:44:29,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:29,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:44:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421087066] [2020-10-28 14:44:29,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:44:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:44:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:44:29,502 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-28 14:44:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:29,616 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-28 14:44:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:44:29,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 14:44:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:29,619 INFO L225 Difference]: With dead ends: 28 [2020-10-28 14:44:29,619 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:44:29,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:44:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-28 14:44:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:44:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 14:44:29,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-10-28 14:44:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:29,626 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 14:44:29,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:44:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 14:44:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:44:29,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:29,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:29,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:44:29,628 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:29,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1321002758, now seen corresponding path program 1 times [2020-10-28 14:44:29,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:29,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070763106] [2020-10-28 14:44:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:29,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:29,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:44:29,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:29,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 14:44:29,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:29,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:29,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:44:29,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:29,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:44:29,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:29,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:29,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:29,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:29,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:29,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:29,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:29,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:29,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:29,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:29,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070763106] [2020-10-28 14:44:29,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:29,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:44:29,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019381853] [2020-10-28 14:44:29,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:44:29,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:44:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:44:29,935 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-28 14:44:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:30,140 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-28 14:44:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:44:30,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 14:44:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:30,142 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:44:30,142 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:44:30,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:44:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-28 14:44:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:44:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-28 14:44:30,150 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-28 14:44:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:30,151 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-28 14:44:30,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:44:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-28 14:44:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:44:30,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:30,152 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:30,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:44:30,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash -154266195, now seen corresponding path program 2 times [2020-10-28 14:44:30,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:30,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845992734] [2020-10-28 14:44:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:30,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:30,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:44:30,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-28 14:44:30,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:30,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:44:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:30,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:44:30,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:30,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:30,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:30,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:30,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:30,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:30,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:30,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:30,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:30,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845992734] [2020-10-28 14:44:30,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:30,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:44:30,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049613678] [2020-10-28 14:44:30,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:44:30,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:30,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:44:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:44:30,696 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-28 14:44:31,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:31,381 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-28 14:44:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:44:31,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-28 14:44:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:31,382 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:44:31,382 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:44:31,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:44:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:44:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-28 14:44:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:44:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 14:44:31,391 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-10-28 14:44:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:31,391 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 14:44:31,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:44:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 14:44:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:44:31,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:31,392 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:31,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:44:31,393 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash -342528080, now seen corresponding path program 3 times [2020-10-28 14:44:31,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:31,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434536215] [2020-10-28 14:44:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:31,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:31,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:44:31,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:31,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-28 14:44:31,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:31,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:31,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:44:31,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:31,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:32,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:32,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:32,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:32,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:32,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:32,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:32,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:32,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:32,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:32,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434536215] [2020-10-28 14:44:32,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:32,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:44:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064709666] [2020-10-28 14:44:32,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:44:32,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:32,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:44:32,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:44:32,023 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-10-28 14:44:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:32,401 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-28 14:44:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:32,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 14:44:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:32,404 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:44:32,405 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:44:32,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:44:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:44:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-28 14:44:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:44:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-28 14:44:32,412 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-10-28 14:44:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:32,412 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-28 14:44:32,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:44:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-28 14:44:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:44:32,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:32,413 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:32,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:44:32,414 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2019084073, now seen corresponding path program 4 times [2020-10-28 14:44:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:32,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041355386] [2020-10-28 14:44:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:32,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:32,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:32,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:44:32,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:32,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-28 14:44:32,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:32,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:32,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:44:32,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:32,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:44:32,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:33,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:33,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:33,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:33,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:33,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:33,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:33,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:33,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:33,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041355386] [2020-10-28 14:44:33,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:33,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:44:33,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422909601] [2020-10-28 14:44:33,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:44:33,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:44:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:44:33,226 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-28 14:44:33,827 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-28 14:44:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:34,208 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-28 14:44:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:44:34,209 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-28 14:44:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:34,210 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:44:34,210 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:44:34,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:44:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:44:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-28 14:44:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:44:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-28 14:44:34,218 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-10-28 14:44:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:34,218 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-28 14:44:34,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:44:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-28 14:44:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:44:34,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:34,220 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:34,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:44:34,220 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash -696681292, now seen corresponding path program 5 times [2020-10-28 14:44:34,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:34,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095694694] [2020-10-28 14:44:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:34,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:34,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:44:34,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:34,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-28 14:44:34,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:34,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:44:34,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:34,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:44:34,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:35,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:35,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:35,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:35,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:35,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:35,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:35,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:35,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:35,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095694694] [2020-10-28 14:44:35,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:35,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:44:35,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501509454] [2020-10-28 14:44:35,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:44:35,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:35,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:44:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:44:35,237 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-10-28 14:44:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:35,772 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-28 14:44:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:44:35,773 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-28 14:44:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:35,774 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:44:35,774 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:44:35,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:44:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:44:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-28 14:44:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:44:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-28 14:44:35,792 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2020-10-28 14:44:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:35,792 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-28 14:44:35,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:44:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-28 14:44:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:44:35,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:35,796 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:35,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:44:35,797 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1744536805, now seen corresponding path program 6 times [2020-10-28 14:44:35,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:35,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648637267] [2020-10-28 14:44:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:35,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:36,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:36,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:44:36,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:36,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-28 14:44:36,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:36,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:44:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:44:36,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:36,946 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-28 14:44:37,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:37,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:37,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:37,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:37,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:37,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:37,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:37,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:37,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:37,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648637267] [2020-10-28 14:44:37,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:37,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:44:37,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745149937] [2020-10-28 14:44:37,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:44:37,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:37,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:44:37,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:37,226 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-10-28 14:44:37,813 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 14:44:38,016 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-28 14:44:38,235 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:44:38,466 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-28 14:44:38,682 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-28 14:44:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:39,150 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-28 14:44:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:44:39,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 14:44:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:39,152 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:44:39,152 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:44:39,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:44:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:44:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-28 14:44:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:44:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-28 14:44:39,160 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2020-10-28 14:44:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:39,160 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-28 14:44:39,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:44:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-28 14:44:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:44:39,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:39,162 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:39,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:44:39,162 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1689971586, now seen corresponding path program 7 times [2020-10-28 14:44:39,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:39,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969159999] [2020-10-28 14:44:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:39,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:39,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:39,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:44:39,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:39,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-28 14:44:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:39,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:44:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:44:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:40,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:40,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:40,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:40,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:40,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:40,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:40,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:40,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:40,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969159999] [2020-10-28 14:44:40,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:40,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:44:40,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575077531] [2020-10-28 14:44:40,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:44:40,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:40,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:44:40,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:40,921 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-10-28 14:44:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:41,623 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-28 14:44:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:44:41,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:44:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:41,625 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:44:41,625 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:44:41,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:44:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:44:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-28 14:44:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:44:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-28 14:44:41,640 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-10-28 14:44:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:41,640 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-28 14:44:41,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:44:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-28 14:44:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:44:41,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:41,645 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:41,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:44:41,646 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:41,648 INFO L82 PathProgramCache]: Analyzing trace with hash -368100549, now seen corresponding path program 8 times [2020-10-28 14:44:41,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:41,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611990013] [2020-10-28 14:44:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:41,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:42,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:42,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:44:42,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:42,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-28 14:44:42,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:42,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:42,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:44:42,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:42,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:44:42,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:43,332 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-28 14:44:43,731 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-28 14:44:44,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:44,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:44,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:44,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:44,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:44,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:44,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:44,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:44,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:44,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611990013] [2020-10-28 14:44:44,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:44,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:44:44,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592525225] [2020-10-28 14:44:44,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:44:44,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:44:44,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:44:44,204 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 18 states. [2020-10-28 14:44:44,913 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-28 14:44:45,140 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-28 14:44:45,498 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 67 [2020-10-28 14:44:45,771 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-28 14:44:46,185 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-10-28 14:44:46,472 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-28 14:44:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:47,234 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-28 14:44:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:44:47,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-28 14:44:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:47,237 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:44:47,237 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:44:47,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:44:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:44:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-28 14:44:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:44:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-28 14:44:47,246 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2020-10-28 14:44:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:47,247 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-28 14:44:47,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:44:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-28 14:44:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:44:47,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:47,248 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:47,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:44:47,248 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1245268126, now seen corresponding path program 9 times [2020-10-28 14:44:47,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:47,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018383505] [2020-10-28 14:44:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:47,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:48,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:48,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:44:48,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:48,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-28 14:44:48,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:48,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:48,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:44:48,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:44:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:48,886 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-28 14:44:49,273 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-28 14:44:49,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:49,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:49,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:49,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:49,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:49,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:49,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:49,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:49,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:49,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:49,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:49,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018383505] [2020-10-28 14:44:49,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:49,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:44:49,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780778520] [2020-10-28 14:44:49,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:44:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:44:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:44:49,703 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 18 states. [2020-10-28 14:44:50,213 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-28 14:44:50,529 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-28 14:44:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:50,875 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-28 14:44:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:44:50,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-28 14:44:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:50,877 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:44:50,877 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:44:50,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:44:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:44:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-28 14:44:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:44:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-28 14:44:50,892 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2020-10-28 14:44:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:50,892 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-28 14:44:50,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:44:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-28 14:44:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:44:50,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:50,894 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:50,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:44:50,894 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:50,894 INFO L82 PathProgramCache]: Analyzing trace with hash -662375031, now seen corresponding path program 10 times [2020-10-28 14:44:50,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:50,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869523044] [2020-10-28 14:44:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:51,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:52,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:52,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:44:52,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:52,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-28 14:44:52,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:52,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:52,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:44:52,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:52,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:44:52,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:52,836 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-28 14:44:52,965 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-28 14:44:53,186 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 14:44:53,339 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 14:44:53,568 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-28 14:44:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:54,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:54,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:54,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:54,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:54,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:54,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:54,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:54,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:54,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:54,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:54,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:54,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869523044] [2020-10-28 14:44:54,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:54,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:44:54,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317087650] [2020-10-28 14:44:54,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:44:54,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:54,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:44:54,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:44:54,180 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-10-28 14:44:55,276 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-28 14:44:55,550 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-28 14:44:55,985 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2020-10-28 14:44:56,336 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-10-28 14:44:56,865 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-10-28 14:44:57,236 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-10-28 14:44:57,476 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 14:44:57,633 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 14:44:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:58,433 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-10-28 14:44:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:44:58,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-28 14:44:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:58,436 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:44:58,436 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:44:58,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:44:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:44:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-28 14:44:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:44:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-28 14:44:58,455 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2020-10-28 14:44:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:58,455 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-28 14:44:58,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:44:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-28 14:44:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:44:58,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:58,456 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:58,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:44:58,457 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1948110252, now seen corresponding path program 11 times [2020-10-28 14:44:58,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:58,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604390298] [2020-10-28 14:44:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:58,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:00,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:00,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:45:00,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:00,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1800 [2020-10-28 14:45:00,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:00,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:45:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:45:00,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:01,213 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-28 14:45:01,413 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 14:45:01,670 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-28 14:45:01,883 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-28 14:45:02,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:02,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:02,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:02,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:02,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:02,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:45:02,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:02,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:02,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:02,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:02,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:02,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604390298] [2020-10-28 14:45:02,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:02,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:45:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254619250] [2020-10-28 14:45:02,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:45:02,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:45:02,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:45:02,387 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2020-10-28 14:45:03,220 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-28 14:45:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:03,667 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-28 14:45:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:45:03,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-28 14:45:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:03,670 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:45:03,670 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:45:03,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:45:03,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:45:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-10-28 14:45:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:45:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-28 14:45:03,682 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-10-28 14:45:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:03,682 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-28 14:45:03,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:45:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-28 14:45:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:45:03,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:03,683 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:03,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:45:03,683 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash -745534899, now seen corresponding path program 12 times [2020-10-28 14:45:03,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:03,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427091969] [2020-10-28 14:45:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:06,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:06,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:45:06,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:06,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-28 14:45:06,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:06,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:45:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:45:06,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 14:45:06,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:06,711 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-28 14:45:06,863 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 14:45:07,118 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-28 14:45:07,341 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-28 14:45:07,735 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-28 14:45:08,000 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-28 14:45:08,355 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-28 14:45:08,551 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-28 14:45:09,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:09,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:09,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:09,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:09,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 24 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:09,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427091969] [2020-10-28 14:45:09,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:09,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:45:09,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030631430] [2020-10-28 14:45:09,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:45:09,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:09,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:45:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:45:09,360 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 24 states. [2020-10-28 14:45:10,608 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 14:45:10,925 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-28 14:45:11,299 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-28 14:45:11,718 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-28 14:45:12,284 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 89 [2020-10-28 14:45:12,843 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 95 [2020-10-28 14:45:13,799 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 119 [2020-10-28 14:45:14,471 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 115 [2020-10-28 14:45:15,614 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 227 DAG size of output: 142 [2020-10-28 14:45:16,308 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 117 [2020-10-28 14:45:16,780 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-10-28 14:45:17,189 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-10-28 14:45:17,465 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-28 14:45:17,728 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-28 14:45:17,920 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:45:18,107 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 14:45:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:18,733 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-28 14:45:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:45:18,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-28 14:45:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:18,735 INFO L225 Difference]: With dead ends: 70 [2020-10-28 14:45:18,735 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:45:18,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:45:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:45:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-28 14:45:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:45:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-28 14:45:18,745 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2020-10-28 14:45:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:18,745 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-28 14:45:18,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:45:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-28 14:45:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:45:18,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:18,746 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:18,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:45:18,748 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1167608048, now seen corresponding path program 13 times [2020-10-28 14:45:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:18,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661165349] [2020-10-28 14:45:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:21,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:21,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:45:21,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:21,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-10-28 14:45:21,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:21,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:45:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:21,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 14:45:21,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:21,993 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-28 14:45:22,189 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-28 14:45:22,552 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-28 14:45:22,856 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-28 14:45:23,365 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2020-10-28 14:45:23,768 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-28 14:45:24,419 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2020-10-28 14:45:24,896 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-10-28 14:45:25,475 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2020-10-28 14:45:25,872 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2020-10-28 14:45:26,262 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2020-10-28 14:45:26,571 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-28 14:45:27,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:27,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:27,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:27,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:27,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:27,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:45:27,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:27,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:27,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:27,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:27,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:27,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:27,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661165349] [2020-10-28 14:45:27,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:27,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:45:27,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739617270] [2020-10-28 14:45:27,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:45:27,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:27,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:45:27,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:45:27,248 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-10-28 14:45:28,763 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2020-10-28 14:45:29,526 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2020-10-28 14:45:30,261 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-28 14:45:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:31,080 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-28 14:45:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:45:31,082 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-28 14:45:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:31,083 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:45:31,083 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 14:45:31,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:45:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 14:45:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-28 14:45:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:45:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-28 14:45:31,093 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2020-10-28 14:45:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:31,093 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-28 14:45:31,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:45:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-28 14:45:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:45:31,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:31,095 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:31,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:45:31,095 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash 214869239, now seen corresponding path program 14 times [2020-10-28 14:45:31,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:31,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470055119] [2020-10-28 14:45:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:31,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:34,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:34,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:45:34,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2986 [2020-10-28 14:45:34,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:34,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:45:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:45:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:45:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:34,951 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-28 14:45:35,302 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-28 14:45:35,490 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-28 14:45:35,838 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-28 14:45:36,107 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-28 14:45:36,573 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-28 14:45:36,975 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-28 14:45:37,452 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-28 14:45:37,775 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-28 14:45:38,074 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-28 14:45:38,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:38,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:38,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:38,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:38,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 16 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:38,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470055119] [2020-10-28 14:45:38,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:38,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:45:38,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911009439] [2020-10-28 14:45:38,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:45:38,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:45:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:45:38,919 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 27 states. [2020-10-28 14:45:39,782 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-28 14:45:40,044 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 14:45:40,336 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-28 14:45:40,650 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-28 14:45:41,030 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-28 14:45:41,411 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-28 14:45:41,889 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-28 14:45:42,340 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-28 14:45:43,217 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 101 [2020-10-28 14:45:43,904 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 98 [2020-10-28 14:45:45,182 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 220 DAG size of output: 119 [2020-10-28 14:45:46,104 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 122 [2020-10-28 14:45:47,799 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 260 DAG size of output: 145 [2020-10-28 14:45:48,793 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 124 [2020-10-28 14:45:49,478 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-28 14:45:50,073 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 108 [2020-10-28 14:45:50,496 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-10-28 14:45:50,913 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-10-28 14:45:51,226 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-28 14:45:51,532 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-28 14:45:51,755 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-28 14:45:51,981 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 14:45:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:45:52,693 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-10-28 14:45:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:45:52,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 66 [2020-10-28 14:45:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:45:52,695 INFO L225 Difference]: With dead ends: 77 [2020-10-28 14:45:52,696 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:45:52,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=691, Invalid=2615, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 14:45:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:45:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-28 14:45:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:45:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-28 14:45:52,708 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2020-10-28 14:45:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:45:52,708 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-28 14:45:52,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:45:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-28 14:45:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:45:52,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:45:52,709 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:45:52,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:45:52,710 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:45:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:45:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1454908454, now seen corresponding path program 15 times [2020-10-28 14:45:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:45:52,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272622736] [2020-10-28 14:45:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:45:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:52,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:55,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:55,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:45:55,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:55,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2677 [2020-10-28 14:45:55,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:55,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:55,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:45:55,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:45:55,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:45:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:56,686 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 14:45:56,840 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-28 14:45:57,282 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-28 14:45:57,838 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-28 14:45:58,437 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-10-28 14:45:58,765 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-28 14:45:59,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:45:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:45:59,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:45:59,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:45:59,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:45:59,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:45:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:45:59,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:45:59,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:45:59,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:45:59,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:45:59,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:45:59,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:45:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 8 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:45:59,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272622736] [2020-10-28 14:45:59,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:45:59,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:45:59,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427977716] [2020-10-28 14:45:59,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:45:59,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:45:59,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:45:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:45:59,774 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 27 states. [2020-10-28 14:46:01,220 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-28 14:46:01,655 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-28 14:46:02,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:02,571 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-28 14:46:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:46:02,573 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2020-10-28 14:46:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:02,574 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:46:02,574 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:46:02,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:46:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:46:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-28 14:46:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 14:46:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-28 14:46:02,585 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2020-10-28 14:46:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:02,586 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-28 14:46:02,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:46:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-28 14:46:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 14:46:02,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:02,587 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:02,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:46:02,587 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash -666102689, now seen corresponding path program 16 times [2020-10-28 14:46:02,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:02,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061314804] [2020-10-28 14:46:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:02,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:05,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:05,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 14:46:05,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:05,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3138 [2020-10-28 14:46:05,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:05,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:46:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:46:05,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 14:46:05,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:07,090 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-28 14:46:07,309 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-28 14:46:07,794 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-28 14:46:08,051 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-28 14:46:08,943 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-28 14:46:09,516 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2020-10-28 14:46:10,812 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 142 DAG size of output: 90 [2020-10-28 14:46:11,717 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 81 [2020-10-28 14:46:12,754 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2020-10-28 14:46:13,651 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 83 [2020-10-28 14:46:14,963 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 156 DAG size of output: 81 [2020-10-28 14:46:15,687 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 63 [2020-10-28 14:46:16,390 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 57 [2020-10-28 14:46:16,864 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-28 14:46:17,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:46:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:17,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:17,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:17,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:46:17,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 20 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:46:17,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061314804] [2020-10-28 14:46:17,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:46:17,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:46:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494176282] [2020-10-28 14:46:17,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:46:17,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:46:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:46:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:46:17,955 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 30 states. [2020-10-28 14:46:18,790 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-28 14:46:19,101 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-28 14:46:19,434 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-28 14:46:19,808 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-28 14:46:20,229 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-28 14:46:20,676 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-28 14:46:21,210 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-28 14:46:21,749 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-28 14:46:22,790 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 104 [2020-10-28 14:46:23,685 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 105 [2020-10-28 14:46:25,309 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 234 DAG size of output: 128 [2020-10-28 14:46:26,481 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 192 DAG size of output: 123 [2020-10-28 14:46:28,986 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 328 DAG size of output: 149 [2020-10-28 14:46:30,546 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 238 DAG size of output: 151 [2020-10-28 14:46:33,579 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 374 DAG size of output: 175 [2020-10-28 14:46:35,130 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 240 DAG size of output: 153 [2020-10-28 14:46:35,959 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 103 [2020-10-28 14:46:36,619 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 105 [2020-10-28 14:46:37,078 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-10-28 14:46:37,510 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-28 14:46:37,706 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:46:37,894 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:46:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:46:39,335 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-10-28 14:46:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:46:39,336 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 73 [2020-10-28 14:46:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:46:39,337 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:46:39,338 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:46:39,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=813, Invalid=3219, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 14:46:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:46:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-28 14:46:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:46:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 14:46:39,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2020-10-28 14:46:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:46:39,347 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 14:46:39,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:46:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 14:46:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 14:46:39,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:46:39,349 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:46:39,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:46:39,349 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:46:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:46:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1329620034, now seen corresponding path program 17 times [2020-10-28 14:46:39,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:46:39,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955521080] [2020-10-28 14:46:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:46:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:46:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:46:42,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3476 [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:46:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 14:46:42,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:46:46,192 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 14:46:46,382 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-28 14:46:46,686 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-28 14:46:47,022 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2020-10-28 14:46:47,880 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2020-10-28 14:46:48,771 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 68 [2020-10-28 14:46:50,120 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 189 DAG size of output: 91 [2020-10-28 14:46:51,133 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 83 [2020-10-28 14:46:52,430 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 155 DAG size of output: 102 [2020-10-28 14:46:56,237 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 440 DAG size of output: 120 [2020-10-28 14:46:59,086 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 467 DAG size of output: 72 [2020-10-28 14:47:00,008 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 55 [2020-10-28 14:47:00,794 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 50 [2020-10-28 14:47:01,113 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 45 [2020-10-28 14:47:01,387 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-10-28 14:47:02,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:47:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:02,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:02,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:47:02,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:02,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:47:02,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:02,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:47:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:47:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:47:02,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:47:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 9 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:47:02,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955521080] [2020-10-28 14:47:02,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:47:02,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:47:02,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395072399] [2020-10-28 14:47:02,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:47:02,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:47:02,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:47:02,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:47:02,300 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 30 states. [2020-10-28 14:47:03,909 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2020-10-28 14:47:05,281 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 118 [2020-10-28 14:47:06,882 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 144 DAG size of output: 127 [2020-10-28 14:47:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:47:08,291 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-28 14:47:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:47:08,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2020-10-28 14:47:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:47:08,294 INFO L225 Difference]: With dead ends: 118 [2020-10-28 14:47:08,294 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:47:08,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:47:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:47:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-28 14:47:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:47:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-28 14:47:08,305 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-10-28 14:47:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:47:08,305 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-28 14:47:08,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:47:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-28 14:47:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 14:47:08,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:47:08,306 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:47:08,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:47:08,307 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:47:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:47:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 251701605, now seen corresponding path program 18 times [2020-10-28 14:47:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:47:08,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124885849] [2020-10-28 14:47:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:47:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:47:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:47:13,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 14:47:13,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0