/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/forester-heap/dll-queue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:45:57,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:45:57,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:45:57,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:45:57,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:45:57,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:45:57,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:45:57,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:45:57,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:45:57,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:45:57,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:45:57,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:45:57,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:45:57,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:45:57,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:45:57,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:45:57,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:45:57,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:45:57,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:45:57,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:45:57,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:45:57,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:45:57,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:45:57,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:45:57,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:45:57,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:45:57,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:45:57,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:45:57,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:45:57,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:45:57,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:45:57,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:45:57,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:45:57,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:45:57,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:45:57,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:45:57,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:45:57,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:45:57,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:45:57,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:45:57,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:45:57,898 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 19:45:57,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:45:57,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:45:57,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:45:57,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:45:57,926 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:45:57,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:45:57,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:45:57,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:45:57,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:45:57,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:45:57,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:45:57,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:45:57,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:45:57,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:45:57,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:45:57,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:45:57,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:45:57,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:45:57,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:45:57,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:45:57,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:45:57,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:45:57,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:45:57,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:45:57,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:45:57,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:45:57,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:45:57,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:45:57,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:45:57,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:45:58,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:45:58,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:45:58,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:45:58,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:45:58,312 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:45:58,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-queue-2.i [2020-10-27 19:45:58,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaa0793af/0f053051aa7b40f6837fde02cd69df5f/FLAGf92367020 [2020-10-27 19:45:59,010 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:45:59,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-queue-2.i [2020-10-27 19:45:59,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaa0793af/0f053051aa7b40f6837fde02cd69df5f/FLAGf92367020 [2020-10-27 19:45:59,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaa0793af/0f053051aa7b40f6837fde02cd69df5f [2020-10-27 19:45:59,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:45:59,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:45:59,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:59,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:45:59,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:45:59,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@327763ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59, skipping insertion in model container [2020-10-27 19:45:59,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:45:59,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:45:59,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:59,813 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:45:59,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:45:59,930 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:45:59,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59 WrapperNode [2020-10-27 19:45:59,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:45:59,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:45:59,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:45:59,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:45:59,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:45:59,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (1/1) ... [2020-10-27 19:46:00,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:00,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:00,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:00,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:00,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (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 19:46:00,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:00,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:00,107 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:00,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:00,120 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:00,121 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:00,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:00,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:00,814 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:00,815 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-27 19:46:00,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:00 BoogieIcfgContainer [2020-10-27 19:46:00,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:00,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:00,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:00,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:00,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:45:59" (1/3) ... [2020-10-27 19:46:00,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd840ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:00, skipping insertion in model container [2020-10-27 19:46:00,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:45:59" (2/3) ... [2020-10-27 19:46:00,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd840ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:00, skipping insertion in model container [2020-10-27 19:46:00,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:00" (3/3) ... [2020-10-27 19:46:00,834 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-queue-2.i [2020-10-27 19:46:00,846 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:00,851 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:00,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:00,894 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:00,894 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:00,894 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:00,894 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:00,895 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:00,895 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:00,895 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:00,895 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-27 19:46:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 19:46:00,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:00,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:00,918 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-27 19:46:00,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:00,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492242846] [2020-10-27 19:46:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 19:46:01,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:01,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 19:46:01,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:46:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 19:46:01,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:01,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:01,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 19:46:01,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:46:01,454 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 19:46:01,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492242846] [2020-10-27 19:46:01,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:01,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:46:01,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375752939] [2020-10-27 19:46:01,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:46:01,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:46:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:01,480 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2020-10-27 19:46:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:01,731 INFO L93 Difference]: Finished difference Result 168 states and 307 transitions. [2020-10-27 19:46:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:46:01,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-27 19:46:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:01,744 INFO L225 Difference]: With dead ends: 168 [2020-10-27 19:46:01,744 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:46:01,749 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 19:46:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:46:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 19:46:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:46:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2020-10-27 19:46:01,796 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 11 [2020-10-27 19:46:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:01,797 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2020-10-27 19:46:01,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:46:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2020-10-27 19:46:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 19:46:01,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:01,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:01,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:01,799 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:01,800 INFO L82 PathProgramCache]: Analyzing trace with hash 794710855, now seen corresponding path program 1 times [2020-10-27 19:46:01,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:01,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487720328] [2020-10-27 19:46:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 19:46:01,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:01,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 19:46:01,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:46:01,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:01,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:01,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:01,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:01,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:01,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:46:01,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:01,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:01,955 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 19:46:01,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487720328] [2020-10-27 19:46:01,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:01,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:01,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334248754] [2020-10-27 19:46:01,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:01,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:01,959 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 4 states. [2020-10-27 19:46:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:02,129 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-27 19:46:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:02,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 19:46:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:02,131 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:46:02,131 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 19:46:02,133 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 19:46:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 19:46:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 19:46:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 19:46:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-27 19:46:02,144 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 12 [2020-10-27 19:46:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,144 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-27 19:46:02,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-27 19:46:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:46:02,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:02,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:02,146 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-27 19:46:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290044805] [2020-10-27 19:46:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:46:02,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 19:46:02,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:46:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:02,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:46:02,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,418 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 19:46:02,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290044805] [2020-10-27 19:46:02,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:02,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:02,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883532632] [2020-10-27 19:46:02,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:02,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:02,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:02,423 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-27 19:46:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:02,625 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-27 19:46:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:02,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 19:46:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:02,627 INFO L225 Difference]: With dead ends: 71 [2020-10-27 19:46:02,627 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 19:46:02,628 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 19:46:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 19:46:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 19:46:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:46:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-27 19:46:02,638 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-27 19:46:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,638 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-27 19:46:02,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-27 19:46:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 19:46:02,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:02,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:02,640 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-27 19:46:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104203243] [2020-10-27 19:46:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 19:46:02,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 19:46:02,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:02,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:02,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:02,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:02,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:02,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:02,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:02,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:02,734 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 19:46:02,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104203243] [2020-10-27 19:46:02,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:02,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356973445] [2020-10-27 19:46:02,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:02,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:02,737 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-27 19:46:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:02,890 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-27 19:46:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:02,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 19:46:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:02,892 INFO L225 Difference]: With dead ends: 146 [2020-10-27 19:46:02,892 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 19:46:02,893 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 19:46:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 19:46:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-27 19:46:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 19:46:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-27 19:46:02,904 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-27 19:46:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:02,904 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-27 19:46:02,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-27 19:46:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:46:02,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:02,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:02,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:02,906 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-27 19:46:02,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:02,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173948009] [2020-10-27 19:46:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:02,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:02,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:46:03,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:03,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-27 19:46:03,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 19:46:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:03,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:46:03,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:03,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:03,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:03,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,407 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 19:46:03,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173948009] [2020-10-27 19:46:03,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:03,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115485150] [2020-10-27 19:46:03,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:03,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:03,409 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 4 states. [2020-10-27 19:46:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:03,563 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-27 19:46:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:03,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 19:46:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:03,564 INFO L225 Difference]: With dead ends: 80 [2020-10-27 19:46:03,565 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 19:46:03,565 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 19:46:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 19:46:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 19:46:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:46:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-10-27 19:46:03,574 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 23 [2020-10-27 19:46:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:03,574 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-10-27 19:46:03,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-10-27 19:46:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:46:03,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:03,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:03,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:03,576 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash 939558397, now seen corresponding path program 1 times [2020-10-27 19:46:03,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:03,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019439246] [2020-10-27 19:46:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:46:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 19:46:03,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:03,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:03,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:03,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:03,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:03,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:03,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:03,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:03,841 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 19:46:03,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019439246] [2020-10-27 19:46:03,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:03,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:03,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850238079] [2020-10-27 19:46:03,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:03,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:03,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:03,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:03,844 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 5 states. [2020-10-27 19:46:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:04,040 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2020-10-27 19:46:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:04,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 19:46:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:04,042 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:46:04,042 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 19:46:04,042 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 19:46:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 19:46:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 19:46:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-27 19:46:04,050 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 23 [2020-10-27 19:46:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:04,050 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-27 19:46:04,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-27 19:46:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:04,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:04,051 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:04,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:04,052 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-27 19:46:04,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:04,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236388384] [2020-10-27 19:46:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:04,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:04,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 19:46:04,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:04,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:04,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:04,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:04,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:04,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:04,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:04,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:04,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:04,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:04,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236388384] [2020-10-27 19:46:04,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:04,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:46:04,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653594533] [2020-10-27 19:46:04,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:04,335 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 7 states. [2020-10-27 19:46:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:04,636 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-27 19:46:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:04,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 19:46:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:04,649 INFO L225 Difference]: With dead ends: 130 [2020-10-27 19:46:04,650 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 19:46:04,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 19:46:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2020-10-27 19:46:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 19:46:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-27 19:46:04,660 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2020-10-27 19:46:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:04,661 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-27 19:46:04,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-27 19:46:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:04,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:04,662 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:04,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:04,663 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-27 19:46:04,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:04,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339382345] [2020-10-27 19:46:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:04,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:04,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-27 19:46:04,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:46:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:05,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:05,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:05,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:05,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:05,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339382345] [2020-10-27 19:46:05,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:05,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:05,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504208061] [2020-10-27 19:46:05,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:05,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:05,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:05,020 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 4 states. [2020-10-27 19:46:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:05,186 INFO L93 Difference]: Finished difference Result 171 states and 215 transitions. [2020-10-27 19:46:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:05,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 19:46:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:05,187 INFO L225 Difference]: With dead ends: 171 [2020-10-27 19:46:05,187 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 19:46:05,188 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 19:46:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 19:46:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-27 19:46:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:46:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-27 19:46:05,197 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 26 [2020-10-27 19:46:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:05,197 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-27 19:46:05,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-27 19:46:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:05,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:05,198 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:05,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:05,199 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2123363362, now seen corresponding path program 1 times [2020-10-27 19:46:05,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:05,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645892267] [2020-10-27 19:46:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:05,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:05,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 19:46:05,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:46:05,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:46:05,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:05,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:05,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:05,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:05,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:05,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:05,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:05,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645892267] [2020-10-27 19:46:05,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:05,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:05,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446272632] [2020-10-27 19:46:05,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:05,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:05,582 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 4 states. [2020-10-27 19:46:05,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:05,781 INFO L93 Difference]: Finished difference Result 198 states and 247 transitions. [2020-10-27 19:46:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:05,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 19:46:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:05,783 INFO L225 Difference]: With dead ends: 198 [2020-10-27 19:46:05,784 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 19:46:05,785 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 19:46:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 19:46:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2020-10-27 19:46:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:46:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-10-27 19:46:05,802 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 30 [2020-10-27 19:46:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:05,802 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-10-27 19:46:05,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-10-27 19:46:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:05,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:05,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:05,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:05,807 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:05,807 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-27 19:46:05,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:05,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550226697] [2020-10-27 19:46:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:06,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:06,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-27 19:46:06,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:06,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:46:06,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:46:06,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:06,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:06,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:06,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:06,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:06,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:46:06,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550226697] [2020-10-27 19:46:06,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:06,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:06,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925153792] [2020-10-27 19:46:06,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:06,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:06,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:06,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:06,442 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 4 states. [2020-10-27 19:46:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:06,642 INFO L93 Difference]: Finished difference Result 221 states and 274 transitions. [2020-10-27 19:46:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:06,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 19:46:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:06,644 INFO L225 Difference]: With dead ends: 221 [2020-10-27 19:46:06,644 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:46:06,645 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 19:46:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:46:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2020-10-27 19:46:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:46:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-10-27 19:46:06,653 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 33 [2020-10-27 19:46:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:06,653 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-10-27 19:46:06,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-10-27 19:46:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:06,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:06,654 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:06,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:06,654 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-27 19:46:06,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:06,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927553305] [2020-10-27 19:46:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:07,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:07,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:07,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-27 19:46:07,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:07,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:07,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:46:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:07,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:07,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:07,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:07,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:07,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:07,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:07,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:07,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:07,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:07,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927553305] [2020-10-27 19:46:07,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:07,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:07,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329771134] [2020-10-27 19:46:07,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:07,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:07,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:07,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:07,251 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 8 states. [2020-10-27 19:46:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:07,578 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-10-27 19:46:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:07,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 19:46:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:07,580 INFO L225 Difference]: With dead ends: 125 [2020-10-27 19:46:07,580 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 19:46:07,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 19:46:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-27 19:46:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 19:46:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-27 19:46:07,590 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 34 [2020-10-27 19:46:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:07,592 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-27 19:46:07,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-27 19:46:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:07,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:07,594 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:07,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:07,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1668646551, now seen corresponding path program 1 times [2020-10-27 19:46:07,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:07,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772579287] [2020-10-27 19:46:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:07,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:07,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:07,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:07,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 19:46:07,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:07,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:07,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:46:07,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:08,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:08,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:08,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:08,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:08,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772579287] [2020-10-27 19:46:08,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:08,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:08,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214987133] [2020-10-27 19:46:08,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:08,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:08,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:08,051 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 8 states. [2020-10-27 19:46:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:08,480 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2020-10-27 19:46:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:08,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 19:46:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:08,482 INFO L225 Difference]: With dead ends: 148 [2020-10-27 19:46:08,482 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 19:46:08,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 19:46:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2020-10-27 19:46:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 19:46:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-10-27 19:46:08,492 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 35 [2020-10-27 19:46:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:08,492 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-10-27 19:46:08,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-10-27 19:46:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:46:08,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:08,493 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:08,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:08,494 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-27 19:46:08,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:08,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005525729] [2020-10-27 19:46:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:08,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:08,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:46:08,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:08,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-27 19:46:08,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:46:08,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:08,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:08,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:08,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:08,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:08,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:08,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:08,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:08,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:08,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:08,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:08,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005525729] [2020-10-27 19:46:08,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:08,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:08,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888731946] [2020-10-27 19:46:08,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:08,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:08,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:08,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:08,938 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 8 states. [2020-10-27 19:46:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:09,373 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2020-10-27 19:46:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:09,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-27 19:46:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:09,376 INFO L225 Difference]: With dead ends: 169 [2020-10-27 19:46:09,376 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 19:46:09,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 19:46:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2020-10-27 19:46:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 19:46:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2020-10-27 19:46:09,385 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 37 [2020-10-27 19:46:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:09,386 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2020-10-27 19:46:09,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2020-10-27 19:46:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:46:09,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:09,387 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:09,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:09,387 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:09,388 INFO L82 PathProgramCache]: Analyzing trace with hash -28871154, now seen corresponding path program 1 times [2020-10-27 19:46:09,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:09,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265982811] [2020-10-27 19:46:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:10,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:46:10,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:10,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-27 19:46:10,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 19:46:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:46:10,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:10,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:10,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:10,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:10,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:10,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:10,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:10,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:10,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:10,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:10,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 19:46:10,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265982811] [2020-10-27 19:46:10,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:10,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:10,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53915289] [2020-10-27 19:46:10,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:10,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:10,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:10,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:10,189 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 4 states. [2020-10-27 19:46:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:10,408 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-10-27 19:46:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:10,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-27 19:46:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:10,410 INFO L225 Difference]: With dead ends: 211 [2020-10-27 19:46:10,410 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 19:46:10,410 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 19:46:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 19:46:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-27 19:46:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:46:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-10-27 19:46:10,418 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2020-10-27 19:46:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:10,419 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-10-27 19:46:10,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-10-27 19:46:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:46:10,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:10,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:10,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:10,421 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:10,422 INFO L82 PathProgramCache]: Analyzing trace with hash 989426657, now seen corresponding path program 1 times [2020-10-27 19:46:10,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:10,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096205898] [2020-10-27 19:46:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:10,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:11,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:46:11,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:46:11,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1289 [2020-10-27 19:46:11,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:11,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:11,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 19:46:11,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:46:11,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:11,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:11,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:11,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:11,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:11,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:11,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:11,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:11,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:11,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:11,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096205898] [2020-10-27 19:46:11,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:11,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:46:11,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939788921] [2020-10-27 19:46:11,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:11,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:11,816 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 6 states. [2020-10-27 19:46:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:11,981 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-10-27 19:46:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:11,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 19:46:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:11,983 INFO L225 Difference]: With dead ends: 119 [2020-10-27 19:46:11,983 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:46:11,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:46:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-27 19:46:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:46:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-27 19:46:11,995 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 43 [2020-10-27 19:46:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:11,997 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-27 19:46:11,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-27 19:46:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:46:11,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:11,998 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:11,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:11,998 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 402620643, now seen corresponding path program 1 times [2020-10-27 19:46:11,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:11,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725690946] [2020-10-27 19:46:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:12,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:12,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:12,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:12,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:12,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:12,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:12,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725690946] [2020-10-27 19:46:12,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:12,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:12,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877183957] [2020-10-27 19:46:12,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:12,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:12,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:12,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:12,377 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2020-10-27 19:46:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:12,822 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-27 19:46:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:12,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-27 19:46:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:12,824 INFO L225 Difference]: With dead ends: 120 [2020-10-27 19:46:12,824 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 19:46:12,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 19:46:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 19:46:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:46:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-27 19:46:12,832 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 43 [2020-10-27 19:46:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:12,832 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-27 19:46:12,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-27 19:46:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:46:12,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:12,833 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:12,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:12,834 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash -579609298, now seen corresponding path program 1 times [2020-10-27 19:46:12,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:12,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235781967] [2020-10-27 19:46:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:46:13,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 19:46:13,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:46:13,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:13,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:13,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:13,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:13,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 19:46:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235781967] [2020-10-27 19:46:13,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:13,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:13,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364148892] [2020-10-27 19:46:13,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:13,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:13,574 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 8 states. [2020-10-27 19:46:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:13,809 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-27 19:46:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:13,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-27 19:46:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:13,810 INFO L225 Difference]: With dead ends: 84 [2020-10-27 19:46:13,810 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 19:46:13,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 19:46:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-27 19:46:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 19:46:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-27 19:46:13,817 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 44 [2020-10-27 19:46:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:13,817 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-27 19:46:13,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-27 19:46:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:46:13,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:13,818 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:13,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:13,818 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1664297424, now seen corresponding path program 1 times [2020-10-27 19:46:13,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:13,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194516561] [2020-10-27 19:46:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:46:14,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:14,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-27 19:46:14,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:46:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:14,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:14,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:14,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:14,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:14,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:14,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:14,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194516561] [2020-10-27 19:46:14,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:14,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:14,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3860514] [2020-10-27 19:46:14,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:14,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:14,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:14,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:14,408 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 10 states. [2020-10-27 19:46:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:14,920 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-27 19:46:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:14,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-27 19:46:14,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:14,922 INFO L225 Difference]: With dead ends: 102 [2020-10-27 19:46:14,922 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:46:14,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:46:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-27 19:46:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:46:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-27 19:46:14,931 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 46 [2020-10-27 19:46:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:14,931 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-27 19:46:14,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-27 19:46:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:46:14,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:14,932 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:14,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:46:14,933 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-27 19:46:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:14,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851877197] [2020-10-27 19:46:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:15,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:46:15,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:15,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-27 19:46:15,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:15,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:15,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 19:46:15,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:46:15,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:15,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:15,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:15,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:15,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:15,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:15,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:15,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 19:46:15,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851877197] [2020-10-27 19:46:15,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:15,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:15,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327362816] [2020-10-27 19:46:15,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:15,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:15,932 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 4 states. [2020-10-27 19:46:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:16,108 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-27 19:46:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:16,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 19:46:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:16,109 INFO L225 Difference]: With dead ends: 112 [2020-10-27 19:46:16,110 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 19:46:16,110 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 19:46:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 19:46:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-27 19:46:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:46:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-10-27 19:46:16,119 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 47 [2020-10-27 19:46:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:16,119 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-10-27 19:46:16,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-10-27 19:46:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:46:16,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:16,120 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:16,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:46:16,120 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-27 19:46:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:16,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783890011] [2020-10-27 19:46:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:16,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:16,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:46:16,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:16,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-27 19:46:16,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:16,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:16,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:16,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:46:16,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:16,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:16,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:16,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:16,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:16,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:16,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:16,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783890011] [2020-10-27 19:46:16,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:16,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:16,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217683582] [2020-10-27 19:46:16,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:16,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:16,919 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 9 states. [2020-10-27 19:46:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:17,234 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-27 19:46:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:17,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-27 19:46:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:17,236 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:46:17,236 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 19:46:17,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 19:46:17,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-27 19:46:17,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 19:46:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-27 19:46:17,244 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 47 [2020-10-27 19:46:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:17,244 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-27 19:46:17,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-27 19:46:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:46:17,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:17,245 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:17,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:46:17,246 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:17,246 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-27 19:46:17,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:17,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899633537] [2020-10-27 19:46:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:17,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:46:17,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:17,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-27 19:46:17,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:46:17,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:18,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:18,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:18,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:18,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899633537] [2020-10-27 19:46:18,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:18,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:18,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845307731] [2020-10-27 19:46:18,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:18,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:18,048 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 9 states. [2020-10-27 19:46:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:18,655 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-27 19:46:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:18,655 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-27 19:46:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:18,656 INFO L225 Difference]: With dead ends: 129 [2020-10-27 19:46:18,657 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 19:46:18,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 19:46:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-27 19:46:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 19:46:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-27 19:46:18,666 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 50 [2020-10-27 19:46:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:18,666 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-27 19:46:18,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:18,667 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-27 19:46:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 19:46:18,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:18,667 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:18,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:46:18,668 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:18,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-27 19:46:18,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:18,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793748732] [2020-10-27 19:46:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:46:18,723 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:46:18,723 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:46:18,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:46:18,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:46:18 BoogieIcfgContainer [2020-10-27 19:46:18,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:46:18,757 INFO L168 Benchmark]: Toolchain (without parser) took 19441.36 ms. Allocated memory was 154.1 MB in the beginning and 465.6 MB in the end (delta: 311.4 MB). Free memory was 127.4 MB in the beginning and 372.2 MB in the end (delta: -244.8 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:18,757 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 154.1 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:46:18,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.04 ms. Allocated memory is still 154.1 MB. Free memory was 126.8 MB in the beginning and 104.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:18,759 INFO L168 Benchmark]: Boogie Preprocessor took 73.52 ms. Allocated memory is still 154.1 MB. Free memory was 104.4 MB in the beginning and 101.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:18,759 INFO L168 Benchmark]: RCFGBuilder took 811.16 ms. Allocated memory is still 154.1 MB. Free memory was 101.0 MB in the beginning and 83.9 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:18,760 INFO L168 Benchmark]: TraceAbstraction took 17933.25 ms. Allocated memory was 154.1 MB in the beginning and 465.6 MB in the end (delta: 311.4 MB). Free memory was 83.4 MB in the beginning and 372.2 MB in the end (delta: -288.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:18,762 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 154.1 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 607.04 ms. Allocated memory is still 154.1 MB. Free memory was 126.8 MB in the beginning and 104.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.52 ms. Allocated memory is still 154.1 MB. Free memory was 104.4 MB in the beginning and 101.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 811.16 ms. Allocated memory is still 154.1 MB. Free memory was 101.0 MB in the beginning and 83.9 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17933.25 ms. Allocated memory was 154.1 MB in the beginning and 465.6 MB in the end (delta: 311.4 MB). Free memory was 83.4 MB in the beginning and 372.2 MB in the end (delta: -288.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] head->data = 0 [L1001] SLL* item = head; [L1002] int status = 0; [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND TRUE !status [L1013] item->data = 1 [L1014] status = 1 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND TRUE status == 1 [L1018] item->data = 2 [L1019] status = 2 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND FALSE !(status == 1) [L1021] COND TRUE status >= 2 [L1023] item->data = 3 [L1024] status = 3 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1031] COND FALSE !(!(head != ((void*)0))) [L1032] COND FALSE !(status == 1) [L1037] COND FALSE !(status == 2) [L1043] COND TRUE status == 3 [L1045] COND FALSE !(!(head != ((void*)0))) [L1046] EXPR head->next [L1046] COND FALSE !(!(head->next != ((void*)0))) [L1047] EXPR head->next [L1047] EXPR head->next->next [L1047] COND FALSE !(!(head->next->next != ((void*)0))) [L1048] EXPR head->next [L1048] EXPR head->next->next [L1048] EXPR head->next->next->next [L1048] COND FALSE !(!(head->next->next->next != ((void*)0))) [L1049] EXPR head->next [L1049] EXPR head->next->next [L1049] EXPR head->next->next->next [L1049] EXPR head->next->next->next->data [L1049] COND TRUE !(head->next->next->next->data != 3) [L1049] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-queue-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.8s, OverallIterations: 22, TraceHistogramMax: 4, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1515 SDtfs, 863 SDslu, 2811 SDs, 0 SdLazy, 3136 SolverSat, 279 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 170 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 737 NumberOfCodeBlocks, 737 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 663 ConstructedInterpolants, 0 QuantifiedInterpolants, 311211 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 11 PerfectInterpolantSequences, 89/208 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...