/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=DEEPEST --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-ext2-properties/simple_search_value-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:56:26,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:56:26,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:56:26,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:56:26,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:56:26,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:56:26,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:56:26,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:56:26,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:56:26,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:56:26,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:56:26,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:56:26,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:56:26,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:56:26,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:56:26,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:56:26,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:56:26,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:56:26,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:56:26,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:56:26,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:56:26,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:56:26,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:56:26,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:56:26,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:56:27,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:56:27,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:56:27,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:56:27,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:56:27,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:56:27,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:56:27,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:56:27,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:56:27,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:56:27,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:56:27,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:56:27,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:56:27,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:56:27,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:56:27,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:56:27,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:56:27,023 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 [2020-10-27 19:56:27,096 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:56:27,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:56:27,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:56:27,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:56:27,102 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:56:27,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:56:27,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:56:27,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:56:27,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:56:27,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:56:27,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:56:27,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:56:27,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:56:27,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:56:27,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:56:27,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:56:27,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:56:27,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:56:27,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:56:27,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:56:27,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:56:27,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:56:27,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:56:27,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:56:27,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:56:27,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:56:27,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:56:27,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:56:27,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:56:27,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:56:27,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:56:27,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:56:27,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:56:27,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:56:27,602 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:56:27,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-1.i [2020-10-27 19:56:27,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e473dfde/a1938ad91c064cf0a6e577039892497f/FLAGd56d6e33d [2020-10-27 19:56:28,522 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:56:28,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_search_value-1.i [2020-10-27 19:56:28,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e473dfde/a1938ad91c064cf0a6e577039892497f/FLAGd56d6e33d [2020-10-27 19:56:28,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e473dfde/a1938ad91c064cf0a6e577039892497f [2020-10-27 19:56:28,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:56:28,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:56:28,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:56:28,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:56:28,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:56:28,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:56:28" (1/1) ... [2020-10-27 19:56:28,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d69e628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:28, skipping insertion in model container [2020-10-27 19:56:28,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:56:28" (1/1) ... [2020-10-27 19:56:28,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:56:28,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:56:29,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:56:29,296 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:56:29,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:56:29,472 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:56:29,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29 WrapperNode [2020-10-27 19:56:29,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:56:29,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:56:29,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:56:29,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:56:29,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (1/1) ... [2020-10-27 19:56:29,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (1/1) ... [2020-10-27 19:56:29,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (1/1) ... [2020-10-27 19:56:29,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (1/1) ... [2020-10-27 19:56:29,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (1/1) ... [2020-10-27 19:56:29,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (1/1) ... [2020-10-27 19:56:29,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (1/1) ... [2020-10-27 19:56:29,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:56:29,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:56:29,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:56:29,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:56:29,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (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 [2020-10-27 19:56:29,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:56:29,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:56:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:56:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 19:56:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 19:56:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 19:56:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:56:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:56:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:56:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:56:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:56:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:56:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:56:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:56:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:56:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:56:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:56:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:56:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:56:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:56:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:56:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:56:29,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:56:29,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:56:29,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:56:29,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:56:29,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:56:29,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:56:29,687 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:56:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:56:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 19:56:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 19:56:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:56:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:56:29,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:56:29,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:56:29,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:56:29,689 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:56:29,689 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:56:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:56:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:56:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:56:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:56:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:56:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:56:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:56:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:56:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:56:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:56:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:56:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:56:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:56:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:56:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:56:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:56:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:56:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:56:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:56:29,710 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:56:29,710 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:56:29,710 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:56:29,711 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:56:29,711 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:56:29,711 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:56:29,711 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:56:29,712 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:56:29,712 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:56:29,712 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:56:29,712 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:56:29,712 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:56:29,712 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:56:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:56:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:56:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:56:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:56:29,713 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:56:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:56:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:56:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:56:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:56:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:56:29,714 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:56:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:56:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:56:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:56:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:56:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:56:29,715 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:56:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:56:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:56:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:56:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:56:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:56:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:56:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:56:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:56:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:56:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:56:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:56:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:56:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:56:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:56:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:56:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:56:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:56:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:56:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:56:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:56:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:56:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:56:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:56:30,386 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 19:56:30,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:56:30,528 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 19:56:30,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:56:30 BoogieIcfgContainer [2020-10-27 19:56:30,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:56:30,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:56:30,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:56:30,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:56:30,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:56:28" (1/3) ... [2020-10-27 19:56:30,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430d6637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:56:30, skipping insertion in model container [2020-10-27 19:56:30,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:56:29" (2/3) ... [2020-10-27 19:56:30,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430d6637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:56:30, skipping insertion in model container [2020-10-27 19:56:30,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:56:30" (3/3) ... [2020-10-27 19:56:30,541 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_search_value-1.i [2020-10-27 19:56:30,554 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:56:30,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:56:30,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:56:30,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:56:30,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:56:30,605 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:56:30,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:56:30,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:56:30,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:56:30,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:56:30,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:56:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 19:56:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:56:30,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:30,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:30,632 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -297690078, now seen corresponding path program 1 times [2020-10-27 19:56:30,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:30,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105715439] [2020-10-27 19:56:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:30,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:30,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:30,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:31,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:31,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:56:31,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:31,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-27 19:56:31,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:56:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:56:31,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:31,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:31,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:31,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:31,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:31,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:56:31,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:31,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:31,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105715439] [2020-10-27 19:56:31,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:31,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:56:31,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15700318] [2020-10-27 19:56:31,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:56:31,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:31,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:56:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:56:31,443 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-27 19:56:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:31,600 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-10-27 19:56:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:56:31,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 19:56:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:31,613 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:56:31,613 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 19:56:31,619 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 [2020-10-27 19:56:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 19:56:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 19:56:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 19:56:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-27 19:56:31,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-10-27 19:56:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:31,662 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-27 19:56:31,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:56:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-27 19:56:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:56:31,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:31,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:31,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:56:31,664 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1834434861, now seen corresponding path program 1 times [2020-10-27 19:56:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:31,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088758780] [2020-10-27 19:56:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:31,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:31,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:31,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:31,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:32,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:56:32,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:56:32,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-27 19:56:32,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:32,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:56:32,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:56:32,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:56:32,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:32,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:32,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:32,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:32,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:32,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:56:32,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:32,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:32,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:32,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:32,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:32,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088758780] [2020-10-27 19:56:32,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:32,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:56:32,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165041587] [2020-10-27 19:56:32,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:56:32,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:56:32,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:56:32,362 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-27 19:56:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:32,441 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-27 19:56:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:56:32,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 19:56:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:32,443 INFO L225 Difference]: With dead ends: 36 [2020-10-27 19:56:32,443 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 19:56:32,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:56:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 19:56:32,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 19:56:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 19:56:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 19:56:32,451 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-10-27 19:56:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:32,451 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 19:56:32,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:56:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 19:56:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:56:32,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:32,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:32,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:56:32,453 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:32,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1651185809, now seen corresponding path program 1 times [2020-10-27 19:56:32,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:32,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988021304] [2020-10-27 19:56:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:32,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:56:32,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:32,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-27 19:56:32,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:56:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:56:32,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:32,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:32,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:32,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:32,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:32,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:32,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:56:32,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:32,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:32,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:32,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988021304] [2020-10-27 19:56:32,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:32,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:56:32,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459786044] [2020-10-27 19:56:32,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:56:32,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:56:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:56:32,909 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-10-27 19:56:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:33,005 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-27 19:56:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:56:33,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 19:56:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:33,006 INFO L225 Difference]: With dead ends: 47 [2020-10-27 19:56:33,007 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 19:56:33,007 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 [2020-10-27 19:56:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 19:56:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 19:56:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 19:56:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 19:56:33,014 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-10-27 19:56:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:33,015 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 19:56:33,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:56:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 19:56:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:56:33,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:33,016 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:33,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:56:33,016 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash -747014688, now seen corresponding path program 1 times [2020-10-27 19:56:33,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:33,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546283896] [2020-10-27 19:56:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:33,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:33,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:33,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:33,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:33,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:56:33,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:33,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 19:56:33,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:56:33,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:33,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:56:33,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:33,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:33,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:33,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:33,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:33,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:33,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:33,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:33,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:33,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546283896] [2020-10-27 19:56:33,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:33,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:56:33,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604357164] [2020-10-27 19:56:33,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:56:33,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:56:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:56:33,401 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-27 19:56:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:33,508 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-27 19:56:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:56:33,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 19:56:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:33,513 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:56:33,513 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 19:56:33,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:56:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 19:56:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-27 19:56:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 19:56:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 19:56:33,521 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-27 19:56:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:33,521 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 19:56:33,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:56:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 19:56:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:56:33,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:33,522 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:33,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:56:33,523 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash 346821105, now seen corresponding path program 2 times [2020-10-27 19:56:33,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:33,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083061338] [2020-10-27 19:56:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:33,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:34,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:34,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:56:34,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:34,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-27 19:56:34,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:34,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:56:34,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:34,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:56:34,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:34,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:34,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:34,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:34,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:34,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:56:34,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:34,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:34,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083061338] [2020-10-27 19:56:34,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:34,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:56:34,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721720521] [2020-10-27 19:56:34,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:56:34,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:56:34,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:56:34,148 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2020-10-27 19:56:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:34,342 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-27 19:56:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:56:34,343 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 19:56:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:34,344 INFO L225 Difference]: With dead ends: 57 [2020-10-27 19:56:34,344 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 19:56:34,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:56:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 19:56:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-27 19:56:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 19:56:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 19:56:34,352 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-10-27 19:56:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:34,353 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 19:56:34,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:56:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 19:56:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:56:34,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:34,354 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:34,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:56:34,354 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:34,355 INFO L82 PathProgramCache]: Analyzing trace with hash 331176064, now seen corresponding path program 3 times [2020-10-27 19:56:34,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:34,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231150471] [2020-10-27 19:56:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:34,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:35,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:35,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:56:35,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-27 19:56:35,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:56:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:35,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:56:35,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:35,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:35,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:35,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:35,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:35,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:35,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:56:35,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:35,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:35,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:35,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:35,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:35,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231150471] [2020-10-27 19:56:35,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:35,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:56:35,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741867744] [2020-10-27 19:56:35,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:56:35,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:56:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:56:35,126 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-27 19:56:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:35,322 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-27 19:56:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:56:35,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 19:56:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:35,326 INFO L225 Difference]: With dead ends: 62 [2020-10-27 19:56:35,326 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 19:56:35,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:56:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 19:56:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 19:56:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 19:56:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 19:56:35,341 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2020-10-27 19:56:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:35,342 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 19:56:35,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:56:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 19:56:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:56:35,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:35,345 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:35,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:56:35,346 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1049416529, now seen corresponding path program 4 times [2020-10-27 19:56:35,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:35,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855918815] [2020-10-27 19:56:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:35,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:35,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:36,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:36,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:56:36,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-27 19:56:36,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:56:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:56:36,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:36,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:36,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:36,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:36,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:36,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:36,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:36,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:36,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855918815] [2020-10-27 19:56:36,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:36,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:56:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637311682] [2020-10-27 19:56:36,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:56:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:36,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:56:36,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:56:36,311 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2020-10-27 19:56:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:36,498 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-27 19:56:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:56:36,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-27 19:56:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:36,499 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:56:36,499 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 19:56:36,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:56:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 19:56:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-27 19:56:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:56:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-27 19:56:36,507 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2020-10-27 19:56:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:36,508 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-27 19:56:36,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:56:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-27 19:56:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:56:36,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:36,509 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:36,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:56:36,510 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 285111072, now seen corresponding path program 5 times [2020-10-27 19:56:36,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:36,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27609490] [2020-10-27 19:56:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:36,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:36,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:36,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:37,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:56:37,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:37,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-27 19:56:37,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:37,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:56:37,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:37,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:56:37,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:37,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:37,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:37,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:37,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:37,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:56:37,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:37,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:37,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:37,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:37,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:37,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27609490] [2020-10-27 19:56:37,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:37,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:56:37,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278173389] [2020-10-27 19:56:37,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:56:37,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:37,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:56:37,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:56:37,662 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 10 states. [2020-10-27 19:56:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:37,855 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-27 19:56:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:56:37,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 19:56:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:37,856 INFO L225 Difference]: With dead ends: 72 [2020-10-27 19:56:37,856 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:56:37,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:56:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:56:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 19:56:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:56:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-27 19:56:37,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 42 [2020-10-27 19:56:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:37,879 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-27 19:56:37,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:56:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-27 19:56:37,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:56:37,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:37,881 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:37,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:56:37,881 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash -789357391, now seen corresponding path program 6 times [2020-10-27 19:56:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:37,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104401460] [2020-10-27 19:56:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:37,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:37,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:38,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:39,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:56:39,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:39,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1209 [2020-10-27 19:56:39,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:39,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:56:39,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:39,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:56:39,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:39,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:39,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:39,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:39,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:39,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:56:39,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:39,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:39,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104401460] [2020-10-27 19:56:39,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:39,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:56:39,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439089373] [2020-10-27 19:56:39,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:56:39,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:56:39,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:56:39,265 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 11 states. [2020-10-27 19:56:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:39,485 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-10-27 19:56:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:56:39,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-27 19:56:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:39,488 INFO L225 Difference]: With dead ends: 77 [2020-10-27 19:56:39,488 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 19:56:39,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:56:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 19:56:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-27 19:56:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:56:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-27 19:56:39,500 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2020-10-27 19:56:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:39,501 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-27 19:56:39,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:56:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-27 19:56:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:56:39,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:39,504 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:39,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:56:39,504 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2048312768, now seen corresponding path program 7 times [2020-10-27 19:56:39,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:39,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547103826] [2020-10-27 19:56:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:41,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:41,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:56:41,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1723 [2020-10-27 19:56:41,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:56:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:56:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:41,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:41,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:41,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:41,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:41,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:41,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:56:41,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:41,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:41,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:41,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:41,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547103826] [2020-10-27 19:56:41,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:41,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:56:41,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119733005] [2020-10-27 19:56:41,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:56:41,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:56:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:56:41,456 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 12 states. [2020-10-27 19:56:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:41,678 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-27 19:56:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:56:41,679 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-27 19:56:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:41,681 INFO L225 Difference]: With dead ends: 82 [2020-10-27 19:56:41,681 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 19:56:41,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:56:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 19:56:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-27 19:56:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 19:56:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-27 19:56:41,695 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2020-10-27 19:56:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:41,696 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-27 19:56:41,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:56:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-27 19:56:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 19:56:41,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:41,700 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:41,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:56:41,700 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1430629905, now seen corresponding path program 8 times [2020-10-27 19:56:41,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:41,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102279567] [2020-10-27 19:56:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:41,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:42,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:43,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:43,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 19:56:43,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:43,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-10-27 19:56:43,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:43,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:56:43,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:43,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:56:43,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:43,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:43,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:43,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:43,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:43,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:43,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:43,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:43,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:43,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:43,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:43,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:43,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102279567] [2020-10-27 19:56:43,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:43,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:56:43,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537247177] [2020-10-27 19:56:43,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:56:43,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:56:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:56:43,759 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-10-27 19:56:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:44,010 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-27 19:56:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:56:44,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-27 19:56:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:44,014 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:56:44,014 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 19:56:44,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:56:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 19:56:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 19:56:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:56:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-27 19:56:44,023 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 57 [2020-10-27 19:56:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:44,024 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-27 19:56:44,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:56:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-27 19:56:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 19:56:44,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:44,028 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:44,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:56:44,029 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1251979168, now seen corresponding path program 9 times [2020-10-27 19:56:44,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:44,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370434018] [2020-10-27 19:56:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:44,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:44,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:46,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:46,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 19:56:46,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:46,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-10-27 19:56:46,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:56:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 19:56:46,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:46,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:46,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:46,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:46,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:46,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:56:46,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:46,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:56:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 9 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:46,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370434018] [2020-10-27 19:56:46,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:46,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:56:46,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061233581] [2020-10-27 19:56:46,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:56:46,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:56:46,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:56:46,405 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 14 states. [2020-10-27 19:56:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:46,764 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-10-27 19:56:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:56:46,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 19:56:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:46,766 INFO L225 Difference]: With dead ends: 92 [2020-10-27 19:56:46,766 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 19:56:46,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:56:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 19:56:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 19:56:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:56:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-27 19:56:46,784 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2020-10-27 19:56:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:46,785 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-27 19:56:46,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:56:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-27 19:56:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 19:56:46,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:46,786 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:46,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:56:46,787 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1298777969, now seen corresponding path program 10 times [2020-10-27 19:56:46,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:46,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055737178] [2020-10-27 19:56:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:46,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:46,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:47,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:47,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:56:47,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:56:47,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 19:56:47,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:47,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:56:47,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:56:47,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 19:56:47,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:47,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:47,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:47,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:47,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:47,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:47,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:56:47,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:47,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:47,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-27 19:56:47,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055737178] [2020-10-27 19:56:47,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:47,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:56:47,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360647633] [2020-10-27 19:56:47,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:56:47,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:56:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:56:47,309 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 5 states. [2020-10-27 19:56:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:47,419 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-27 19:56:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:56:47,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 19:56:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:47,421 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:56:47,421 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:56:47,422 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 [2020-10-27 19:56:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:56:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 19:56:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:56:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-27 19:56:47,430 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 67 [2020-10-27 19:56:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:47,431 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-27 19:56:47,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:56:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-27 19:56:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:56:47,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:47,434 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:47,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:56:47,434 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1033830600, now seen corresponding path program 1 times [2020-10-27 19:56:47,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:47,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660543587] [2020-10-27 19:56:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:47,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:49,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:52,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:53,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:53,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:56:53,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:56:53,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6134 [2020-10-27 19:56:53,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:56:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 19:56:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:56:53,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:53,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:53,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:53,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:53,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:53,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:53,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:53,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:53,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:53,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:53,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:53,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-27 19:56:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660543587] [2020-10-27 19:56:53,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:56:53,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:56:53,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913039447] [2020-10-27 19:56:53,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:56:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:56:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:56:53,701 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-10-27 19:56:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:53,793 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-10-27 19:56:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:56:53,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 19:56:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:53,794 INFO L225 Difference]: With dead ends: 86 [2020-10-27 19:56:53,794 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 19:56:53,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:56:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 19:56:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-27 19:56:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 19:56:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-27 19:56:53,801 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 72 [2020-10-27 19:56:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:53,802 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-27 19:56:53,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:56:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-27 19:56:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:56:53,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:53,803 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:53,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:56:53,803 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:53,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1486129334, now seen corresponding path program 1 times [2020-10-27 19:56:53,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:53,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267717557] [2020-10-27 19:56:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:53,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:54,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:56,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:58,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:58,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:56:58,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:58,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 19:56:58,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:56:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:56:58,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 19:56:58,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:57:03,303 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 27 [2020-10-27 19:57:04,438 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 141 DAG size of output: 49 [2020-10-27 19:57:04,754 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-27 19:57:05,336 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2020-10-27 19:57:05,907 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 55 [2020-10-27 19:57:06,932 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 60 [2020-10-27 19:57:07,344 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-27 19:57:08,094 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 69 [2020-10-27 19:57:08,591 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-27 19:57:09,470 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 67 [2020-10-27 19:57:09,867 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-27 19:57:10,328 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-27 19:57:10,699 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-27 19:57:11,087 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-27 19:57:11,394 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 19:57:11,715 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-27 19:57:12,060 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-27 19:57:12,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:12,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:12,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:12,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:12,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:12,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:57:12,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:12,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:12,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:12,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:12,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 29 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:12,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267717557] [2020-10-27 19:57:12,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:12,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:57:12,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539412021] [2020-10-27 19:57:12,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:57:12,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:57:12,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:57:12,657 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 28 states. [2020-10-27 19:57:13,406 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-27 19:57:13,780 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-10-27 19:57:14,038 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-27 19:57:14,527 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2020-10-27 19:57:14,797 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-27 19:57:15,218 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-27 19:57:15,481 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-27 19:57:15,941 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-27 19:57:16,292 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-27 19:57:16,862 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2020-10-27 19:57:17,167 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-27 19:57:17,729 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 75 [2020-10-27 19:57:18,074 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-27 19:57:18,671 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 77 [2020-10-27 19:57:19,022 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-27 19:57:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:19,439 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-10-27 19:57:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:57:19,440 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-27 19:57:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:19,441 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:57:19,441 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:57:19,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:57:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:57:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-10-27 19:57:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 19:57:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-27 19:57:19,459 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 72 [2020-10-27 19:57:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:19,459 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-27 19:57:19,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:57:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-27 19:57:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:57:19,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:19,463 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:19,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:57:19,464 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1713888970, now seen corresponding path program 1 times [2020-10-27 19:57:19,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:19,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743714773] [2020-10-27 19:57:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:19,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:20,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:23,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:24,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:24,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:57:24,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:57:24,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4574 [2020-10-27 19:57:24,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:57:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:57:24,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 19:57:24,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:26,981 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 24 [2020-10-27 19:57:28,021 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 180 DAG size of output: 50 [2020-10-27 19:57:31,099 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 362 DAG size of output: 69 [2020-10-27 19:57:32,176 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 139 DAG size of output: 67 [2020-10-27 19:57:34,011 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 212 DAG size of output: 82 [2020-10-27 19:57:35,244 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 161 DAG size of output: 74 [2020-10-27 19:57:38,876 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 364 DAG size of output: 84 [2020-10-27 19:57:39,941 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 64 [2020-10-27 19:57:42,001 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 233 DAG size of output: 78 [2020-10-27 19:57:43,255 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 164 DAG size of output: 60 [2020-10-27 19:57:44,724 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 202 DAG size of output: 75 [2020-10-27 19:57:45,387 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 65 [2020-10-27 19:57:46,493 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 69 [2020-10-27 19:57:46,993 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-27 19:57:47,746 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 83 [2020-10-27 19:57:48,242 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-10-27 19:57:48,778 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 75 [2020-10-27 19:57:49,210 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-27 19:57:49,599 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2020-10-27 19:57:49,881 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-27 19:57:50,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:50,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:50,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:50,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:50,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:57:50,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:50,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:50,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743714773] [2020-10-27 19:57:50,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:50,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:57:50,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346804801] [2020-10-27 19:57:50,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:57:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:57:50,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:57:50,546 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 28 states. [2020-10-27 19:57:51,325 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 86 [2020-10-27 19:57:51,668 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 19:57:52,472 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 88 [2020-10-27 19:57:53,054 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2020-10-27 19:57:53,416 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 19:57:53,888 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2020-10-27 19:57:54,326 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-27 19:57:54,962 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 79 [2020-10-27 19:57:55,377 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-27 19:57:56,098 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 81 [2020-10-27 19:57:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:56,543 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-27 19:57:56,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:57:56,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-27 19:57:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:56,546 INFO L225 Difference]: With dead ends: 96 [2020-10-27 19:57:56,546 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 19:57:56,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:57:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 19:57:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2020-10-27 19:57:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:57:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-27 19:57:56,562 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 72 [2020-10-27 19:57:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:56,564 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-27 19:57:56,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:57:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-27 19:57:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:57:56,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:56,565 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:56,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:57:56,566 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash -806070964, now seen corresponding path program 1 times [2020-10-27 19:57:56,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:56,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579635709] [2020-10-27 19:57:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:56,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:58,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:58,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:57:58,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:58,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-10-27 19:57:58,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:58,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:57:58,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:57:58,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 19:57:58,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:58,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:58,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:58,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:58,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:58,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:58,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:57:58,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:58,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 8 proven. 180 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 19:57:59,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579635709] [2020-10-27 19:57:59,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:59,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:57:59,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332681123] [2020-10-27 19:57:59,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:57:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:59,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:57:59,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:57:59,068 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 17 states. [2020-10-27 19:57:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:59,741 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-10-27 19:57:59,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:57:59,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-27 19:57:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:59,743 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:57:59,743 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:57:59,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:57:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:57:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2020-10-27 19:57:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:57:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-27 19:57:59,755 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 72 [2020-10-27 19:57:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:59,755 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-27 19:57:59,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:57:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-27 19:57:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:57:59,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:59,756 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:59,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:57:59,756 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2020263697, now seen corresponding path program 2 times [2020-10-27 19:57:59,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:59,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673737119] [2020-10-27 19:57:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:59,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:00,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:03,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:04,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:04,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:04,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:58:04,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:58:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 19:58:04,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:58:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:58:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 19:58:04,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:09,192 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-27 19:58:09,655 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-27 19:58:10,946 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 141 DAG size of output: 77 [2020-10-27 19:58:11,857 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 96 [2020-10-27 19:58:13,516 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 187 DAG size of output: 82 [2020-10-27 19:58:15,982 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 259 DAG size of output: 85 [2020-10-27 19:58:17,540 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 295 DAG size of output: 82 [2020-10-27 19:58:19,958 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 305 DAG size of output: 91 [2020-10-27 19:58:21,241 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 233 DAG size of output: 52 [2020-10-27 19:58:23,412 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 277 DAG size of output: 80 [2020-10-27 19:58:25,377 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 282 DAG size of output: 83 [2020-10-27 19:58:28,176 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 376 DAG size of output: 101 [2020-10-27 19:58:29,435 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 190 DAG size of output: 83 [2020-10-27 19:58:32,229 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 247 DAG size of output: 121 [2020-10-27 19:58:33,593 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 201 DAG size of output: 98 [2020-10-27 19:58:36,377 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 277 DAG size of output: 104 [2020-10-27 19:58:37,540 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 102 [2020-10-27 19:58:38,840 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 174 DAG size of output: 84 [2020-10-27 19:58:39,362 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 61 [2020-10-27 19:58:40,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:40,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:40,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:40,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:40,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:40,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:58:40,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:40,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:40,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:40,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:40,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:58:40,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673737119] [2020-10-27 19:58:40,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:58:40,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:58:40,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553023651] [2020-10-27 19:58:40,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:58:40,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:40,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:58:40,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=751, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:58:40,308 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 29 states. [2020-10-27 19:58:41,149 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-10-27 19:58:41,839 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 101 [2020-10-27 19:58:43,097 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 139 [2020-10-27 19:58:43,949 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 113 [2020-10-27 19:58:44,455 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-27 19:58:45,751 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 133 [2020-10-27 19:58:47,589 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 176 DAG size of output: 146 [2020-10-27 19:58:49,346 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 181 DAG size of output: 159 [2020-10-27 19:58:50,934 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 171 DAG size of output: 157 [2020-10-27 19:58:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:52,827 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-10-27 19:58:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:58:52,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-10-27 19:58:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:52,830 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:58:52,830 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 19:58:52,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=157, Invalid=1735, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:58:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 19:58:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2020-10-27 19:58:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 19:58:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-27 19:58:52,841 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 77 [2020-10-27 19:58:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:52,841 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-27 19:58:52,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 19:58:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-27 19:58:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:58:52,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:52,842 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:52,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:58:52,842 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash 925314705, now seen corresponding path program 1 times [2020-10-27 19:58:52,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:52,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273239184] [2020-10-27 19:58:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:52,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:52,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:54,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:56,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:57,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:57,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:58:57,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:58:57,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 19:58:57,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:58:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 19:58:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:58:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:57,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:58:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:57,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:57,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:58:57,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:58:57,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:58:57,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:58:57,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:58:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:58:57,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:58:57,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:58:57,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:58:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-10-27 19:58:57,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273239184] [2020-10-27 19:58:57,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:58:57,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:58:57,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424212667] [2020-10-27 19:58:57,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:58:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:58:57,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:58:57,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:58:57,991 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 5 states. [2020-10-27 19:58:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:58:58,099 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-10-27 19:58:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:58:58,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-27 19:58:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:58:58,103 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:58:58,103 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 19:58:58,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:58:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 19:58:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-10-27 19:58:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 19:58:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-27 19:58:58,117 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 77 [2020-10-27 19:58:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:58:58,117 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-27 19:58:58,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:58:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-27 19:58:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:58:58,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:58:58,118 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:58:58,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:58:58,119 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:58:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:58:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1594645229, now seen corresponding path program 1 times [2020-10-27 19:58:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:58:58,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033305005] [2020-10-27 19:58:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:58:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:58:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:58:59,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:00,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:02,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4621 [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:59:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:06,066 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2020-10-27 19:59:08,222 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 195 DAG size of output: 52 [2020-10-27 19:59:10,986 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-10-27 19:59:12,409 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 230 DAG size of output: 94 [2020-10-27 19:59:15,360 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 244 DAG size of output: 106 [2020-10-27 19:59:17,318 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 231 DAG size of output: 100 [2020-10-27 19:59:21,372 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 306 DAG size of output: 114 [2020-10-27 19:59:23,281 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 229 DAG size of output: 87 [2020-10-27 19:59:25,775 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 248 DAG size of output: 127 [2020-10-27 19:59:28,278 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 256 DAG size of output: 110 [2020-10-27 19:59:33,110 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 340 DAG size of output: 124 [2020-10-27 19:59:34,701 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 216 DAG size of output: 106 [2020-10-27 19:59:37,098 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 257 DAG size of output: 133 [2020-10-27 19:59:38,393 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 208 DAG size of output: 106 [2020-10-27 19:59:40,527 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 248 DAG size of output: 109 [2020-10-27 19:59:41,935 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 187 DAG size of output: 106 [2020-10-27 19:59:44,016 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 232 DAG size of output: 120 [2020-10-27 19:59:45,112 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 110 [2020-10-27 19:59:46,451 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 177 DAG size of output: 110 [2020-10-27 19:59:47,099 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 61 [2020-10-27 19:59:47,543 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 22 [2020-10-27 19:59:48,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:59:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:59:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:59:48,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:59:48,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:59:48,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:59:48,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:59:48,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:59:48,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:59:48,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:59:48,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:59:48,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:59:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:59:48,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033305005] [2020-10-27 19:59:48,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:59:48,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:59:48,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177615270] [2020-10-27 19:59:48,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:59:48,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:59:48,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:59:48,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:59:48,243 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 29 states. [2020-10-27 19:59:48,955 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 19:59:50,148 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 113 [2020-10-27 19:59:51,697 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 166 DAG size of output: 147 [2020-10-27 19:59:52,846 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 144 [2020-10-27 19:59:54,566 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 228 DAG size of output: 151 [2020-10-27 19:59:55,370 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 106 [2020-10-27 19:59:57,163 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 269 DAG size of output: 171 [2020-10-27 19:59:57,901 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2020-10-27 19:59:59,535 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 237 DAG size of output: 148 [2020-10-27 20:00:00,084 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 88 [2020-10-27 20:00:02,159 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 249 DAG size of output: 164 [2020-10-27 20:00:02,812 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 107 [2020-10-27 20:00:04,225 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 204 DAG size of output: 156 [2020-10-27 20:00:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:05,131 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-10-27 20:00:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:00:05,132 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-10-27 20:00:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:05,133 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:00:05,133 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:00:05,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:00:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:00:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2020-10-27 20:00:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 20:00:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-27 20:00:05,146 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 77 [2020-10-27 20:00:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:05,146 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-27 20:00:05,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:00:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-27 20:00:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:00:05,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:05,147 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:05,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:00:05,148 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash 750981009, now seen corresponding path program 2 times [2020-10-27 20:00:05,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:05,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627192909] [2020-10-27 20:00:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:05,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:05,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:05,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking...