/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-queue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:29:43,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:29:43,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:29:43,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:29:43,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:29:43,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:29:43,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:29:43,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:29:43,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:29:43,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:29:43,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:29:43,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:29:43,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:29:43,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:29:43,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:29:43,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:29:43,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:29:43,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:29:43,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:29:43,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:29:43,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:29:43,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:29:43,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:29:43,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:29:43,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:29:43,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:29:43,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:29:43,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:29:43,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:29:43,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:29:43,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:29:43,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:29:43,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:29:43,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:29:43,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:29:43,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:29:43,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:29:43,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:29:43,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:29:43,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:29:43,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:29:43,429 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:29:43,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:29:43,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:29:43,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:29:43,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:29:43,489 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:29:43,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:29:43,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:29:43,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:29:43,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:29:43,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:29:43,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:29:43,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:29:43,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:29:43,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:29:43,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:29:43,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:29:43,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:29:43,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:29:43,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:29:43,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:29:43,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:29:43,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:43,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:29:43,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:29:43,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:29:43,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:29:43,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:29:43,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:29:43,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:29:43,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:29:43,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:29:43,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:29:43,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:29:43,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:29:43,935 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:29:43,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-queue-1.i [2020-10-28 14:29:44,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1007083ff/eb00c914e539466390576993dd5bc4a6/FLAGab8318262 [2020-10-28 14:29:44,807 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:29:44,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-queue-1.i [2020-10-28 14:29:44,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1007083ff/eb00c914e539466390576993dd5bc4a6/FLAGab8318262 [2020-10-28 14:29:45,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1007083ff/eb00c914e539466390576993dd5bc4a6 [2020-10-28 14:29:45,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:29:45,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:29:45,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:45,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:29:45,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:29:45,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3325e12c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45, skipping insertion in model container [2020-10-28 14:29:45,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:29:45,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:29:45,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:45,580 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:29:45,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:45,758 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:29:45,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45 WrapperNode [2020-10-28 14:29:45,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:45,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:29:45,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:29:45,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:29:45,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... [2020-10-28 14:29:45,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:29:45,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:29:45,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:29:45,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:29:45,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:29:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:29:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:29:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:29:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:29:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:29:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:29:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:29:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:29:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:29:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:29:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:29:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:29:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:29:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:29:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:29:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:29:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:29:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:29:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:29:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:29:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:29:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:29:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:29:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:29:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:29:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:29:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:29:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:29:45,978 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:29:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:29:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:29:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:29:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:29:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:29:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:29:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:29:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:29:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:29:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:29:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:29:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:29:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:29:45,982 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:29:45,982 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:29:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:29:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:29:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:29:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:29:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:29:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:29:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:29:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:29:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:29:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:29:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:29:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:29:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:29:45,985 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:29:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:29:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:29:45,986 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:29:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:29:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:29:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:29:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:29:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:29:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:29:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:29:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:29:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:29:45,990 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:29:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:29:45,991 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:29:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:29:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:29:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:29:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:29:45,992 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:29:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:29:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:29:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:29:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:29:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:29:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:29:45,993 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:29:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:29:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:29:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:29:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:29:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:29:45,994 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:29:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:29:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:29:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:29:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:29:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:29:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:29:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:29:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:29:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:29:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:29:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:29:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:29:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:29:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:29:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:29:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:29:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:29:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:29:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:29:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:29:45,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:29:46,732 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:29:46,732 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-28 14:29:46,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:46 BoogieIcfgContainer [2020-10-28 14:29:46,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:29:46,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:29:46,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:29:46,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:29:46,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:29:45" (1/3) ... [2020-10-28 14:29:46,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244c7eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:46, skipping insertion in model container [2020-10-28 14:29:46,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45" (2/3) ... [2020-10-28 14:29:46,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244c7eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:29:46, skipping insertion in model container [2020-10-28 14:29:46,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:46" (3/3) ... [2020-10-28 14:29:46,752 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-queue-1.i [2020-10-28 14:29:46,767 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:29:46,774 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:29:46,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:29:46,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:29:46,840 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:29:46,841 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:29:46,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:29:46,847 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:29:46,847 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:29:46,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:29:46,848 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:29:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-28 14:29:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-28 14:29:46,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:46,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:46,896 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:46,906 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-28 14:29:46,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:46,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318795486] [2020-10-28 14:29:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:47,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:29:47,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:47,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-28 14:29:47,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:47,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:47,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:29:47,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:47,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:29:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:47,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:47,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:47,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:29:47,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:47,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:47,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:47,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318795486] [2020-10-28 14:29:47,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:47,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:29:47,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359536610] [2020-10-28 14:29:47,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:29:47,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:47,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:29:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:29:47,573 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2020-10-28 14:29:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:47,825 INFO L93 Difference]: Finished difference Result 168 states and 307 transitions. [2020-10-28 14:29:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:29:47,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-28 14:29:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:47,838 INFO L225 Difference]: With dead ends: 168 [2020-10-28 14:29:47,838 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:29:47,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:29:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:29:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 14:29:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:29:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2020-10-28 14:29:47,893 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 11 [2020-10-28 14:29:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:47,893 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2020-10-28 14:29:47,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:29:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2020-10-28 14:29:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:29:47,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:47,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:47,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:29:47,895 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:47,896 INFO L82 PathProgramCache]: Analyzing trace with hash 794710855, now seen corresponding path program 1 times [2020-10-28 14:29:47,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:47,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470015298] [2020-10-28 14:29:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:29:48,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 14:29:48,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:48,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:48,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:29:48,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:48,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:29:48,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:48,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:48,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470015298] [2020-10-28 14:29:48,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:48,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:48,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846991504] [2020-10-28 14:29:48,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:48,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:48,100 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 4 states. [2020-10-28 14:29:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:48,301 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-28 14:29:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:48,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:29:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:48,306 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:29:48,306 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 14:29:48,308 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 [2020-10-28 14:29:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 14:29:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 14:29:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:29:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-28 14:29:48,325 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 12 [2020-10-28 14:29:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:48,326 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-28 14:29:48,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-28 14:29:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:29:48,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:48,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:48,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:29:48,327 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:48,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-28 14:29:48,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:48,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479034028] [2020-10-28 14:29:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:29:48,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-28 14:29:48,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:48,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:29:48,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:29:48,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:48,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:48,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:29:48,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:48,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:48,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479034028] [2020-10-28 14:29:48,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:48,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:48,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477713464] [2020-10-28 14:29:48,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:48,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:48,683 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-28 14:29:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:48,925 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-28 14:29:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:48,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 14:29:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:48,927 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:29:48,927 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:29:48,928 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 [2020-10-28 14:29:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:29:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 14:29:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:29:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-28 14:29:48,948 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-28 14:29:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:48,948 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-28 14:29:48,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-28 14:29:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:29:48,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:48,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:29:48,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:29:48,951 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-28 14:29:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:48,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636668300] [2020-10-28 14:29:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:29:49,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:49,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 14:29:49,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:49,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:49,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:29:49,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:49,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:49,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:49,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:49,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:49,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636668300] [2020-10-28 14:29:49,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:49,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:49,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732984536] [2020-10-28 14:29:49,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:49,121 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-28 14:29:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:49,282 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-28 14:29:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:49,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:29:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:49,284 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:29:49,284 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:29:49,285 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 [2020-10-28 14:29:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:29:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-28 14:29:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 14:29:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-28 14:29:49,295 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-28 14:29:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:49,296 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-28 14:29:49,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-28 14:29:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:29:49,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:49,297 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] [2020-10-28 14:29:49,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:29:49,298 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-28 14:29:49,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:49,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918225163] [2020-10-28 14:29:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:29:49,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:49,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-28 14:29:49,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:49,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:49,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:29:49,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:49,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:49,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:49,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:49,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918225163] [2020-10-28 14:29:49,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:49,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:49,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625987354] [2020-10-28 14:29:49,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:49,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:49,850 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 5 states. [2020-10-28 14:29:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:50,016 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2020-10-28 14:29:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:29:50,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 14:29:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:50,017 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:29:50,017 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:29:50,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:29:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 14:29:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:29:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-28 14:29:50,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 23 [2020-10-28 14:29:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:50,027 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-28 14:29:50,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-28 14:29:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:29:50,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:50,028 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] [2020-10-28 14:29:50,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:29:50,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-28 14:29:50,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:50,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911389911] [2020-10-28 14:29:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:29:50,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-28 14:29:50,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:29:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:29:50,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:50,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:50,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:50,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:50,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:50,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:50,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911389911] [2020-10-28 14:29:50,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:50,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:29:50,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616583318] [2020-10-28 14:29:50,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:29:50,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:29:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:29:50,337 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 7 states. [2020-10-28 14:29:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:50,652 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-28 14:29:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:50,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 14:29:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:50,654 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:29:50,654 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 14:29:50,655 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 [2020-10-28 14:29:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 14:29:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2020-10-28 14:29:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:29:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-28 14:29:50,667 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2020-10-28 14:29:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:50,668 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-28 14:29:50,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:29:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-28 14:29:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:29:50,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:50,669 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] [2020-10-28 14:29:50,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:29:50,670 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-28 14:29:50,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:50,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353634013] [2020-10-28 14:29:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:29:51,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:51,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-28 14:29:51,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:51,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:29:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:51,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:51,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353634013] [2020-10-28 14:29:51,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:51,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436438986] [2020-10-28 14:29:51,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:51,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:51,106 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 4 states. [2020-10-28 14:29:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,294 INFO L93 Difference]: Finished difference Result 171 states and 215 transitions. [2020-10-28 14:29:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:51,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 14:29:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,295 INFO L225 Difference]: With dead ends: 171 [2020-10-28 14:29:51,295 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 14:29:51,296 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 [2020-10-28 14:29:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 14:29:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-28 14:29:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:29:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-28 14:29:51,322 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 26 [2020-10-28 14:29:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,322 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-28 14:29:51,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-28 14:29:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:29:51,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,325 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] [2020-10-28 14:29:51,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:29:51,325 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2123363362, now seen corresponding path program 1 times [2020-10-28 14:29:51,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574901784] [2020-10-28 14:29:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:29:51,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:51,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-28 14:29:51,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:51,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:51,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:29:51,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:51,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:51,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574901784] [2020-10-28 14:29:51,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:51,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107666290] [2020-10-28 14:29:51,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:51,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:51,790 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 4 states. [2020-10-28 14:29:51,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,972 INFO L93 Difference]: Finished difference Result 198 states and 247 transitions. [2020-10-28 14:29:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:51,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:29:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,974 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:29:51,974 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 14:29:51,975 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 [2020-10-28 14:29:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 14:29:51,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2020-10-28 14:29:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:29:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-10-28 14:29:51,986 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 30 [2020-10-28 14:29:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,987 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-10-28 14:29:51,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-10-28 14:29:51,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:29:51,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,988 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] [2020-10-28 14:29:51,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:29:51,988 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-28 14:29:51,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666072141] [2020-10-28 14:29:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:29:52,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:52,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-28 14:29:52,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:29:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:29:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:52,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:52,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:52,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:52,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:52,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:52,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:52,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:29:52,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666072141] [2020-10-28 14:29:52,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:52,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264205748] [2020-10-28 14:29:52,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:52,758 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 4 states. [2020-10-28 14:29:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:52,950 INFO L93 Difference]: Finished difference Result 221 states and 274 transitions. [2020-10-28 14:29:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:52,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:29:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:52,951 INFO L225 Difference]: With dead ends: 221 [2020-10-28 14:29:52,951 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 14:29:52,952 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 [2020-10-28 14:29:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 14:29:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2020-10-28 14:29:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 14:29:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-10-28 14:29:52,970 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 33 [2020-10-28 14:29:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:52,970 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-10-28 14:29:52,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-10-28 14:29:52,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:29:52,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:52,971 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] [2020-10-28 14:29:52,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:29:52,972 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:52,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-28 14:29:52,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:52,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510908774] [2020-10-28 14:29:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:29:53,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-28 14:29:53,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:29:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:53,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:29:53,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:53,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:53,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510908774] [2020-10-28 14:29:53,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:53,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:53,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796470459] [2020-10-28 14:29:53,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:53,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:53,554 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 8 states. [2020-10-28 14:29:53,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:53,907 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-10-28 14:29:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:29:53,911 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 14:29:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:53,913 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:29:53,913 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 14:29:53,914 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 [2020-10-28 14:29:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 14:29:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-28 14:29:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:29:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-28 14:29:53,924 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 34 [2020-10-28 14:29:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:53,924 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-28 14:29:53,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-28 14:29:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:29:53,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:53,926 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] [2020-10-28 14:29:53,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:29:53,926 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:53,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1668646551, now seen corresponding path program 1 times [2020-10-28 14:29:53,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:53,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612986333] [2020-10-28 14:29:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:29:54,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 14:29:54,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:29:54,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:54,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:29:54,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:54,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:54,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:54,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612986333] [2020-10-28 14:29:54,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:54,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:54,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027423479] [2020-10-28 14:29:54,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:54,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:54,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:54,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:54,390 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 8 states. [2020-10-28 14:29:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:54,762 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2020-10-28 14:29:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:29:54,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-28 14:29:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:54,764 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:29:54,764 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 14:29:54,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:29:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 14:29:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2020-10-28 14:29:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:29:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-10-28 14:29:54,777 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 35 [2020-10-28 14:29:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:54,777 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-10-28 14:29:54,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-10-28 14:29:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:29:54,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:54,778 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] [2020-10-28 14:29:54,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:29:54,779 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:54,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-28 14:29:54,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:54,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796285758] [2020-10-28 14:29:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:29:55,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-28 14:29:55,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:29:55,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:29:55,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:55,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:55,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:55,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:55,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:55,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796285758] [2020-10-28 14:29:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:29:55,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397555914] [2020-10-28 14:29:55,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:55,341 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 8 states. [2020-10-28 14:29:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:55,854 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2020-10-28 14:29:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:29:55,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 14:29:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:55,858 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:29:55,858 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 14:29:55,859 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 [2020-10-28 14:29:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 14:29:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2020-10-28 14:29:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:29:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2020-10-28 14:29:55,872 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 37 [2020-10-28 14:29:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:55,873 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2020-10-28 14:29:55,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2020-10-28 14:29:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:29:55,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:55,875 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] [2020-10-28 14:29:55,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:29:55,875 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -28871154, now seen corresponding path program 1 times [2020-10-28 14:29:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:55,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408443519] [2020-10-28 14:29:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:56,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:29:56,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:56,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-28 14:29:56,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:56,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:29:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:56,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:56,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:56,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:56,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:56,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:56,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:56,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:56,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:56,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:56,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 14:29:56,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408443519] [2020-10-28 14:29:56,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:56,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:29:56,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185657014] [2020-10-28 14:29:56,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:29:56,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:29:56,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:29:56,935 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 4 states. [2020-10-28 14:29:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:57,204 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-10-28 14:29:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:29:57,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 14:29:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:57,207 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:29:57,207 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 14:29:57,209 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 [2020-10-28 14:29:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 14:29:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-28 14:29:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:29:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-10-28 14:29:57,223 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2020-10-28 14:29:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:57,224 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-10-28 14:29:57,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:29:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-10-28 14:29:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:29:57,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:57,227 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] [2020-10-28 14:29:57,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:29:57,227 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash 989426657, now seen corresponding path program 1 times [2020-10-28 14:29:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:57,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668629055] [2020-10-28 14:29:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:57,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:58,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:29:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:29:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-28 14:29:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:58,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:29:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:29:58,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:58,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:58,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:58,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:58,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:58,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:58,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:58,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:58,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:58,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:58,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668629055] [2020-10-28 14:29:58,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:58,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:29:58,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955469367] [2020-10-28 14:29:58,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:29:58,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:29:58,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:29:58,656 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 5 states. [2020-10-28 14:29:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:58,819 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-28 14:29:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:29:58,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-28 14:29:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:58,820 INFO L225 Difference]: With dead ends: 111 [2020-10-28 14:29:58,820 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:29:58,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:29:58,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 14:29:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:29:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-28 14:29:58,836 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 43 [2020-10-28 14:29:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:58,837 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-28 14:29:58,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:29:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-28 14:29:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:29:58,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:58,838 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] [2020-10-28 14:29:58,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:29:58,838 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash 402620643, now seen corresponding path program 1 times [2020-10-28 14:29:58,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:58,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407061487] [2020-10-28 14:29:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:29:59,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:59,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-28 14:29:59,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:29:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:59,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:59,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:59,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:29:59,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407061487] [2020-10-28 14:29:59,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:59,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:29:59,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786920138] [2020-10-28 14:29:59,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:29:59,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:59,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:29:59,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:29:59,289 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2020-10-28 14:29:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:59,739 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-28 14:29:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:29:59,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 14:29:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:59,741 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:29:59,741 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:29:59,742 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 [2020-10-28 14:29:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:29:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 14:29:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 14:29:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-28 14:29:59,749 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 43 [2020-10-28 14:29:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:59,749 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-28 14:29:59,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:29:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-28 14:29:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:29:59,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:59,750 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] [2020-10-28 14:29:59,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:29:59,751 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:59,751 INFO L82 PathProgramCache]: Analyzing trace with hash -579609298, now seen corresponding path program 1 times [2020-10-28 14:29:59,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:59,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187173306] [2020-10-28 14:29:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:30:00,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:00,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-28 14:30:00,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:00,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:00,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:30:00,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:00,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:00,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:00,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:00,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:00,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:00,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:00,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:00,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:00,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 14:30:00,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187173306] [2020-10-28 14:30:00,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:00,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:30:00,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018295549] [2020-10-28 14:30:00,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:00,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:00,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:00,443 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 8 states. [2020-10-28 14:30:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:00,689 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-28 14:30:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:30:00,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-28 14:30:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:00,691 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:30:00,691 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:30:00,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:30:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-28 14:30:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:30:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-28 14:30:00,699 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 44 [2020-10-28 14:30:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:00,699 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-28 14:30:00,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-28 14:30:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:30:00,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:00,700 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] [2020-10-28 14:30:00,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:30:00,701 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1664297424, now seen corresponding path program 1 times [2020-10-28 14:30:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:00,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884595563] [2020-10-28 14:30:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:01,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:30:01,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:01,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-28 14:30:01,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:01,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:30:01,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:01,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:01,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:01,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:01,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:01,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:01,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:01,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884595563] [2020-10-28 14:30:01,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:01,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:01,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260597732] [2020-10-28 14:30:01,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:01,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:01,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:01,323 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 10 states. [2020-10-28 14:30:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:01,832 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-28 14:30:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:01,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-28 14:30:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:01,834 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:30:01,834 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:30:01,834 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 [2020-10-28 14:30:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:30:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-28 14:30:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:30:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-28 14:30:01,844 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 46 [2020-10-28 14:30:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:01,844 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-28 14:30:01,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-28 14:30:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:30:01,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:01,845 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] [2020-10-28 14:30:01,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:30:01,845 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-28 14:30:01,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:01,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033097852] [2020-10-28 14:30:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:02,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:30:02,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:02,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-10-28 14:30:02,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:02,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:30:02,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:30:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:02,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:02,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:02,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 14:30:02,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033097852] [2020-10-28 14:30:02,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:02,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:02,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928352693] [2020-10-28 14:30:02,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:02,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:02,958 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 4 states. [2020-10-28 14:30:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:03,132 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-28 14:30:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:03,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 14:30:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:03,134 INFO L225 Difference]: With dead ends: 112 [2020-10-28 14:30:03,134 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:30:03,134 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 [2020-10-28 14:30:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:30:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-28 14:30:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:30:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-10-28 14:30:03,142 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 47 [2020-10-28 14:30:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:03,142 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-10-28 14:30:03,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-10-28 14:30:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:30:03,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:03,143 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] [2020-10-28 14:30:03,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:30:03,143 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:03,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:03,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-28 14:30:03,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:03,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130408975] [2020-10-28 14:30:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:03,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:03,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:30:03,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:03,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-28 14:30:03,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:03,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:03,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:03,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:03,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:30:03,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:03,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:03,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:03,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:03,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:03,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:03,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:03,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:03,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:03,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130408975] [2020-10-28 14:30:03,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:03,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:03,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700062346] [2020-10-28 14:30:03,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:03,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:03,996 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 9 states. [2020-10-28 14:30:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:04,322 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-28 14:30:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:30:04,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-28 14:30:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:04,323 INFO L225 Difference]: With dead ends: 90 [2020-10-28 14:30:04,323 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:30:04,324 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 [2020-10-28 14:30:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:30:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-28 14:30:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:30:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-28 14:30:04,332 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 47 [2020-10-28 14:30:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:04,333 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-28 14:30:04,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-28 14:30:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:30:04,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:04,333 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] [2020-10-28 14:30:04,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:30:04,334 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:04,334 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-28 14:30:04,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:04,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065351668] [2020-10-28 14:30:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:04,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:30:05,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:05,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:05,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:05,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:05,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:05,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:05,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:05,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065351668] [2020-10-28 14:30:05,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:05,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:05,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684993750] [2020-10-28 14:30:05,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:05,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:05,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:05,284 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 9 states. [2020-10-28 14:30:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:05,837 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-28 14:30:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:05,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-28 14:30:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:05,839 INFO L225 Difference]: With dead ends: 129 [2020-10-28 14:30:05,839 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 14:30:05,839 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 [2020-10-28 14:30:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 14:30:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-28 14:30:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:30:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-28 14:30:05,849 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 50 [2020-10-28 14:30:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:05,850 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-28 14:30:05,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-28 14:30:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:30:05,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:05,851 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] [2020-10-28 14:30:05,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:30:05,851 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-28 14:30:05,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:05,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972948555] [2020-10-28 14:30:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:06,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:06,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:30:06,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-28 14:30:06,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:06,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:30:06,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:06,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:06,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:06,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:06,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:06,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:06,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:06,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:06,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:06,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:06,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:06,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972948555] [2020-10-28 14:30:06,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:06,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:06,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054132333] [2020-10-28 14:30:06,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:06,928 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 9 states. [2020-10-28 14:30:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:07,556 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-28 14:30:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:07,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-28 14:30:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:07,557 INFO L225 Difference]: With dead ends: 128 [2020-10-28 14:30:07,558 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 14:30:07,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:07,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 14:30:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2020-10-28 14:30:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 14:30:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-28 14:30:07,569 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 53 [2020-10-28 14:30:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:07,570 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-28 14:30:07,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-28 14:30:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:30:07,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:07,571 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:07,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:30:07,571 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash -981588100, now seen corresponding path program 1 times [2020-10-28 14:30:07,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:07,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039293235] [2020-10-28 14:30:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:07,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:08,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:08,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:30:08,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:08,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-28 14:30:08,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:08,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:08,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:08,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:08,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:30:08,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:08,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:08,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:08,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:08,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:08,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:08,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:08,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:08,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:08,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:08,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039293235] [2020-10-28 14:30:08,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:08,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:08,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740855771] [2020-10-28 14:30:08,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:08,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:08,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:08,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:08,325 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 10 states. [2020-10-28 14:30:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:08,922 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-28 14:30:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:08,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-28 14:30:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:08,926 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:30:08,926 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 14:30:08,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 14:30:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2020-10-28 14:30:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:30:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-28 14:30:08,944 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 54 [2020-10-28 14:30:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:08,945 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-28 14:30:08,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-28 14:30:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:30:08,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:08,948 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:08,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:30:08,948 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2141977510, now seen corresponding path program 2 times [2020-10-28 14:30:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:08,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591343027] [2020-10-28 14:30:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:10,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:30:10,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:10,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:10,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:10,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:10,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:10,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:10,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:10,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:10,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591343027] [2020-10-28 14:30:10,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:10,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:10,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992660498] [2020-10-28 14:30:10,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:10,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:10,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:10,399 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-10-28 14:30:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:10,998 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-28 14:30:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:10,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-28 14:30:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:11,000 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:30:11,000 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:30:11,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:30:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-10-28 14:30:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:30:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-28 14:30:11,011 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 59 [2020-10-28 14:30:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:11,012 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-28 14:30:11,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-28 14:30:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:30:11,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:11,013 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:11,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:30:11,013 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:11,014 INFO L82 PathProgramCache]: Analyzing trace with hash 999069460, now seen corresponding path program 1 times [2020-10-28 14:30:11,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:11,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495085771] [2020-10-28 14:30:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:11,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 14:30:11,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:12,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:12,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:12,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:12,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:12,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:12,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:12,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:12,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:12,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495085771] [2020-10-28 14:30:12,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:12,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:12,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384811181] [2020-10-28 14:30:12,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:12,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:12,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:12,083 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2020-10-28 14:30:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:12,565 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-28 14:30:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:12,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-28 14:30:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:12,566 INFO L225 Difference]: With dead ends: 132 [2020-10-28 14:30:12,566 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 14:30:12,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 14:30:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-28 14:30:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 14:30:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-28 14:30:12,577 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 61 [2020-10-28 14:30:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:12,577 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-28 14:30:12,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-28 14:30:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:30:12,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:12,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:12,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:30:12,579 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:12,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1486843080, now seen corresponding path program 2 times [2020-10-28 14:30:12,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:12,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126460593] [2020-10-28 14:30:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:12,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:13,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:13,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:30:13,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:13,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-28 14:30:13,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:13,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:13,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:30:13,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:13,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:13,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:13,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:13,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:13,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:13,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:13,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:13,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:13,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:13,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126460593] [2020-10-28 14:30:13,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:13,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:13,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710510939] [2020-10-28 14:30:13,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:13,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:13,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:13,452 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2020-10-28 14:30:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:14,083 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2020-10-28 14:30:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:14,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-28 14:30:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:14,085 INFO L225 Difference]: With dead ends: 142 [2020-10-28 14:30:14,085 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:30:14,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:30:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:30:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 14:30:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:30:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-28 14:30:14,093 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 62 [2020-10-28 14:30:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:14,093 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-28 14:30:14,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-28 14:30:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:30:14,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:14,094 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:14,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:30:14,095 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash -667120273, now seen corresponding path program 2 times [2020-10-28 14:30:14,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:14,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418713459] [2020-10-28 14:30:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:15,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:30:15,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:15,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-28 14:30:15,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:15,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:15,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:15,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:30:15,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:15,565 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 14:30:15,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:15,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:15,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:15,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:15,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:15,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:15,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:15,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:15,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:15,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:15,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418713459] [2020-10-28 14:30:15,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:15,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:15,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744014576] [2020-10-28 14:30:15,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:15,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:15,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:15,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:15,827 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 11 states. [2020-10-28 14:30:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:16,667 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2020-10-28 14:30:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:16,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-28 14:30:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:16,668 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:30:16,668 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 14:30:16,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 14:30:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-10-28 14:30:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:30:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-28 14:30:16,679 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 62 [2020-10-28 14:30:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:16,679 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-28 14:30:16,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-28 14:30:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:30:16,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:16,681 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:16,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:30:16,681 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1787771808, now seen corresponding path program 1 times [2020-10-28 14:30:16,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:16,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147199870] [2020-10-28 14:30:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:16,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:17,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:17,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:30:17,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:17,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-28 14:30:17,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:17,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 14:30:17,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:18,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:18,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:18,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:18,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:18,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:18,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:18,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:18,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:18,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:18,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147199870] [2020-10-28 14:30:18,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:18,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:18,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266756710] [2020-10-28 14:30:18,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:18,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:18,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:18,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:18,305 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 12 states. [2020-10-28 14:30:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:18,992 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2020-10-28 14:30:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:30:18,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-28 14:30:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:18,994 INFO L225 Difference]: With dead ends: 156 [2020-10-28 14:30:18,994 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 14:30:18,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:30:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 14:30:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2020-10-28 14:30:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 14:30:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-10-28 14:30:19,005 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 69 [2020-10-28 14:30:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:19,006 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-10-28 14:30:19,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-10-28 14:30:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 14:30:19,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:19,007 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2020-10-28 14:30:19,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:30:19,007 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1551765751, now seen corresponding path program 3 times [2020-10-28 14:30:19,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146982772] [2020-10-28 14:30:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:19,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:20,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 14:30:20,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1838 [2020-10-28 14:30:20,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:20,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:30:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 14:30:20,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:21,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:21,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:21,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:21,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:21,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:21,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:21,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:21,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:21,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:21,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:21,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:21,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:21,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146982772] [2020-10-28 14:30:21,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:21,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871276639] [2020-10-28 14:30:21,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:21,566 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 12 states. [2020-10-28 14:30:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:22,486 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2020-10-28 14:30:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:22,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-28 14:30:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:22,488 INFO L225 Difference]: With dead ends: 138 [2020-10-28 14:30:22,488 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 14:30:22,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 14:30:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 107. [2020-10-28 14:30:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:30:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-28 14:30:22,498 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 71 [2020-10-28 14:30:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:22,498 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-28 14:30:22,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-28 14:30:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 14:30:22,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:22,499 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:22,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:30:22,500 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:22,500 INFO L82 PathProgramCache]: Analyzing trace with hash -685185620, now seen corresponding path program 2 times [2020-10-28 14:30:22,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:22,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997735142] [2020-10-28 14:30:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:22,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:24,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 14:30:24,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:24,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-28 14:30:24,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:24,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 14:30:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:30:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:24,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:24,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:24,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:24,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:24,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:24,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:24,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 14:30:24,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997735142] [2020-10-28 14:30:24,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:24,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472296311] [2020-10-28 14:30:24,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:24,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:24,849 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 9 states. [2020-10-28 14:30:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:25,272 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2020-10-28 14:30:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:25,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-28 14:30:25,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:25,274 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:30:25,274 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 14:30:25,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 14:30:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-28 14:30:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 14:30:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-28 14:30:25,288 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 77 [2020-10-28 14:30:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:25,288 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-28 14:30:25,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-28 14:30:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 14:30:25,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:25,289 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:25,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:30:25,290 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1375814022, now seen corresponding path program 3 times [2020-10-28 14:30:25,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:25,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430176034] [2020-10-28 14:30:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:25,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:26,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:26,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 14:30:26,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-28 14:30:26,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:26,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:26,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:30:26,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:26,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 14:30:26,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:27,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:27,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:27,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:27,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:27,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:27,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430176034] [2020-10-28 14:30:27,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:27,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:27,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718950522] [2020-10-28 14:30:27,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:27,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:27,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:27,143 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 13 states. [2020-10-28 14:30:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:27,826 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-28 14:30:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:27,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-10-28 14:30:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:27,827 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:30:27,827 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:30:27,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:30:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 86. [2020-10-28 14:30:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:30:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-28 14:30:27,838 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 78 [2020-10-28 14:30:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:27,838 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-28 14:30:27,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:30:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-28 14:30:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 14:30:27,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:27,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2020-10-28 14:30:27,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:30:27,840 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1216283912, now seen corresponding path program 4 times [2020-10-28 14:30:27,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:27,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821630417] [2020-10-28 14:30:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:28,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:28,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 14:30:28,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:28,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-10-28 14:30:28,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:28,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:28,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:30:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 14:30:28,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:29,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:29,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:29,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:29,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:29,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:29,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:29,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821630417] [2020-10-28 14:30:29,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:29,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:29,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629977194] [2020-10-28 14:30:29,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:29,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:29,261 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 13 states. [2020-10-28 14:30:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:30,125 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-28 14:30:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:30:30,127 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-10-28 14:30:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:30,128 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:30:30,128 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:30:30,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:30:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:30:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-28 14:30:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 14:30:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-28 14:30:30,142 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 85 [2020-10-28 14:30:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:30,142 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-28 14:30:30,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:30:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-28 14:30:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 14:30:30,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:30,144 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-10-28 14:30:30,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:30:30,145 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1051618334, now seen corresponding path program 5 times [2020-10-28 14:30:30,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:30,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365330957] [2020-10-28 14:30:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:30,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:31,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:31,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:30:31,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:31,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-10-28 14:30:31,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:31,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:30:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 14:30:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:32,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:32,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:32,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:32,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:32,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:32,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:32,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:32,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:32,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:32,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:32,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:32,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365330957] [2020-10-28 14:30:32,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:32,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:30:32,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044096036] [2020-10-28 14:30:32,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:30:32,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:30:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:32,706 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 14 states. [2020-10-28 14:30:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:33,859 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2020-10-28 14:30:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:30:33,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-28 14:30:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:33,861 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:30:33,862 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 14:30:33,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:30:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 14:30:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-28 14:30:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 14:30:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-28 14:30:33,875 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 94 [2020-10-28 14:30:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:33,876 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-28 14:30:33,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:30:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-28 14:30:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 14:30:33,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:33,877 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-10-28 14:30:33,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:30:33,877 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1566970006, now seen corresponding path program 6 times [2020-10-28 14:30:33,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:33,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035338814] [2020-10-28 14:30:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:35,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 14:30:35,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:36,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:36,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:36,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:36,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:36,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:36,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:36,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:36,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:36,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035338814] [2020-10-28 14:30:36,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:36,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:30:36,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769022106] [2020-10-28 14:30:36,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:30:36,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:30:36,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:30:36,229 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 15 states. [2020-10-28 14:30:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:37,645 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2020-10-28 14:30:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:30:37,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2020-10-28 14:30:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:37,647 INFO L225 Difference]: With dead ends: 170 [2020-10-28 14:30:37,647 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:30:37,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:30:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:30:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-28 14:30:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:30:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-28 14:30:37,658 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2020-10-28 14:30:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:37,658 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-28 14:30:37,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:30:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-28 14:30:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 14:30:37,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:37,659 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 14:30:37,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:30:37,660 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash 670492088, now seen corresponding path program 7 times [2020-10-28 14:30:37,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:37,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067770137] [2020-10-28 14:30:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2063 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 14:30:39,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:40,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:40,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:40,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:40,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:40,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:30:40,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:40,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:40,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:40,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:40,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:40,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:40,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067770137] [2020-10-28 14:30:40,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:40,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:30:40,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114163492] [2020-10-28 14:30:40,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:30:40,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:40,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:30:40,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:40,713 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-10-28 14:30:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:42,053 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2020-10-28 14:30:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:30:42,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 103 [2020-10-28 14:30:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:42,055 INFO L225 Difference]: With dead ends: 178 [2020-10-28 14:30:42,055 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:30:42,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:30:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:30:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 141. [2020-10-28 14:30:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 14:30:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-10-28 14:30:42,073 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 103 [2020-10-28 14:30:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:42,074 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-10-28 14:30:42,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:30:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-10-28 14:30:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 14:30:42,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:42,075 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 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] [2020-10-28 14:30:42,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:30:42,075 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1300508420, now seen corresponding path program 8 times [2020-10-28 14:30:42,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:42,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996150448] [2020-10-28 14:30:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2978 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 14:30:45,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:45,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:45,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:45,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:45,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:45,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:45,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:45,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:45,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996150448] [2020-10-28 14:30:45,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:45,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:30:45,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797704609] [2020-10-28 14:30:45,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:30:45,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:30:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:45,913 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 16 states. [2020-10-28 14:30:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:47,660 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2020-10-28 14:30:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:30:47,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-28 14:30:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:47,663 INFO L225 Difference]: With dead ends: 186 [2020-10-28 14:30:47,663 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 14:30:47,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:30:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 14:30:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2020-10-28 14:30:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:30:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-28 14:30:47,678 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 111 [2020-10-28 14:30:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:47,679 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-28 14:30:47,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:30:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-28 14:30:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 14:30:47,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:47,680 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-28 14:30:47,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:30:47,680 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:47,681 INFO L82 PathProgramCache]: Analyzing trace with hash -631989922, now seen corresponding path program 9 times [2020-10-28 14:30:47,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:47,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995758894] [2020-10-28 14:30:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:48,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:50,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:50,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 14:30:50,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:50,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3066 [2020-10-28 14:30:51,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:51,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:30:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 14:30:51,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:51,757 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-28 14:30:51,890 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-28 14:30:52,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:52,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:52,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:52,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995758894] [2020-10-28 14:30:52,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:52,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:30:52,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915881222] [2020-10-28 14:30:52,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:30:52,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:30:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:30:52,390 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 17 states. [2020-10-28 14:30:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:53,908 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2020-10-28 14:30:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:30:53,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-28 14:30:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:53,911 INFO L225 Difference]: With dead ends: 185 [2020-10-28 14:30:53,911 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 14:30:53,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:30:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 14:30:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2020-10-28 14:30:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 14:30:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-28 14:30:53,928 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 112 [2020-10-28 14:30:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:53,929 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-28 14:30:53,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:30:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-28 14:30:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 14:30:53,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:53,930 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2020-10-28 14:30:53,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:30:53,931 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:53,931 INFO L82 PathProgramCache]: Analyzing trace with hash 503934032, now seen corresponding path program 10 times [2020-10-28 14:30:53,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:53,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207970214] [2020-10-28 14:30:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:56,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2269 [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:30:56,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:56,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:56,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:56,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:56,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:56,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:56,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:56,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 20 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:57,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207970214] [2020-10-28 14:30:57,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:57,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:30:57,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427825565] [2020-10-28 14:30:57,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:30:57,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:57,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:30:57,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:30:57,086 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 17 states. [2020-10-28 14:30:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:58,985 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2020-10-28 14:30:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:30:58,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 119 [2020-10-28 14:30:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:58,989 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:30:58,989 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 14:30:58,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:30:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 14:30:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-28 14:30:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:30:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-28 14:30:59,012 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2020-10-28 14:30:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:59,012 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-28 14:30:59,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:30:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-28 14:30:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 14:30:59,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:59,014 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2020-10-28 14:30:59,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:30:59,015 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1356782762, now seen corresponding path program 11 times [2020-10-28 14:30:59,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:59,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223511262] [2020-10-28 14:30:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:59,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3423 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 14:31:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:03,040 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-28 14:31:03,187 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-28 14:31:03,352 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-28 14:31:03,525 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-28 14:31:03,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:03,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:03,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:03,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:03,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:03,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:03,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:03,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:04,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223511262] [2020-10-28 14:31:04,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:04,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:31:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530279094] [2020-10-28 14:31:04,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:31:04,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:31:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:04,084 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 18 states. [2020-10-28 14:31:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:05,962 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2020-10-28 14:31:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:31:05,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-10-28 14:31:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:05,965 INFO L225 Difference]: With dead ends: 203 [2020-10-28 14:31:05,965 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 14:31:05,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:31:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 14:31:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 158. [2020-10-28 14:31:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 14:31:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-28 14:31:05,985 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 120 [2020-10-28 14:31:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:05,986 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-28 14:31:05,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:31:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-28 14:31:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 14:31:05,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:05,987 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 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] [2020-10-28 14:31:05,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:31:05,987 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1966664714, now seen corresponding path program 12 times [2020-10-28 14:31:05,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:05,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557308965] [2020-10-28 14:31:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:06,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:09,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3484 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 14:31:09,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,324 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-28 14:31:10,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:10,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:10,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:10,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:10,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:10,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:10,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:10,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:10,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:11,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557308965] [2020-10-28 14:31:11,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:11,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:31:11,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982500214] [2020-10-28 14:31:11,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:31:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:31:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:31:11,080 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 18 states. [2020-10-28 14:31:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:13,638 INFO L93 Difference]: Finished difference Result 211 states and 214 transitions. [2020-10-28 14:31:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:31:13,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 128 [2020-10-28 14:31:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:13,641 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:31:13,641 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 14:31:13,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:31:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 14:31:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 166. [2020-10-28 14:31:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 14:31:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-28 14:31:13,663 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 128 [2020-10-28 14:31:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:13,663 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-28 14:31:13,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:31:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-28 14:31:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 14:31:13,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:13,664 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2020-10-28 14:31:13,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:31:13,665 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2077632964, now seen corresponding path program 13 times [2020-10-28 14:31:13,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:13,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664897594] [2020-10-28 14:31:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:18,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4204 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 14:31:18,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:18,902 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-28 14:31:19,063 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-28 14:31:19,200 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-28 14:31:19,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:19,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:19,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:19,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:19,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:19,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:19,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:19,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:19,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:19,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664897594] [2020-10-28 14:31:19,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:19,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:31:19,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939949756] [2020-10-28 14:31:19,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:31:19,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:19,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:31:19,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:31:19,808 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 19 states. [2020-10-28 14:31:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:22,392 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2020-10-28 14:31:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:31:22,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 129 [2020-10-28 14:31:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:22,395 INFO L225 Difference]: With dead ends: 278 [2020-10-28 14:31:22,395 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 14:31:22,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:31:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 14:31:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2020-10-28 14:31:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-28 14:31:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2020-10-28 14:31:22,416 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 129 [2020-10-28 14:31:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:22,417 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2020-10-28 14:31:22,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:31:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2020-10-28 14:31:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 14:31:22,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:22,418 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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] [2020-10-28 14:31:22,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:31:22,418 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:22,419 INFO L82 PathProgramCache]: Analyzing trace with hash 349781826, now seen corresponding path program 14 times [2020-10-28 14:31:22,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:22,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261728046] [2020-10-28 14:31:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:22,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:26,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:26,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 14:31:26,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:26,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3982 [2020-10-28 14:31:26,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:26,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:31:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 14:31:26,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:27,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:27,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:27,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:27,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:27,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:27,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:27,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:27,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:27,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:27,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:27,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 24 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:27,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261728046] [2020-10-28 14:31:27,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:27,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:31:27,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227325611] [2020-10-28 14:31:27,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:31:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:31:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:31:27,619 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand 19 states. [2020-10-28 14:31:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:30,172 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-28 14:31:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:31:30,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-10-28 14:31:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:30,175 INFO L225 Difference]: With dead ends: 249 [2020-10-28 14:31:30,175 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 14:31:30,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:31:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 14:31:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-28 14:31:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 14:31:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2020-10-28 14:31:30,194 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 136 [2020-10-28 14:31:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:30,194 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2020-10-28 14:31:30,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:31:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2020-10-28 14:31:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 14:31:30,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:30,196 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2020-10-28 14:31:30,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:31:30,196 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1930733328, now seen corresponding path program 15 times [2020-10-28 14:31:30,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:30,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080626527] [2020-10-28 14:31:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:30,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:35,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4928 [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 14:31:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:36,192 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:31:36,352 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-28 14:31:36,534 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-10-28 14:31:36,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:36,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:37,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080626527] [2020-10-28 14:31:37,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:37,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:31:37,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088510727] [2020-10-28 14:31:37,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:31:37,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:31:37,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:37,170 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 20 states. [2020-10-28 14:31:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:39,916 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2020-10-28 14:31:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:31:39,916 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2020-10-28 14:31:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:39,918 INFO L225 Difference]: With dead ends: 220 [2020-10-28 14:31:39,918 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 14:31:39,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:31:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 14:31:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2020-10-28 14:31:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 14:31:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-28 14:31:39,945 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 137 [2020-10-28 14:31:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:39,947 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-28 14:31:39,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:31:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-28 14:31:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-28 14:31:39,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:39,951 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2020-10-28 14:31:39,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:31:39,951 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:39,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1657079318, now seen corresponding path program 16 times [2020-10-28 14:31:39,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:39,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199934719] [2020-10-28 14:31:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:45,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-28 14:31:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:46,072 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-28 14:31:46,319 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-28 14:31:46,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:46,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:46,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:46,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:46,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:46,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:46,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:46,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:46,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:46,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199934719] [2020-10-28 14:31:46,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:46,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:31:46,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222736951] [2020-10-28 14:31:46,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:31:46,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:46,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:31:46,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:46,953 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 20 states. [2020-10-28 14:31:48,176 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-28 14:31:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:49,141 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2020-10-28 14:31:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:31:49,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 138 [2020-10-28 14:31:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:49,143 INFO L225 Difference]: With dead ends: 219 [2020-10-28 14:31:49,143 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 14:31:49,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:31:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 14:31:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 175. [2020-10-28 14:31:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 14:31:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-28 14:31:49,166 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 138 [2020-10-28 14:31:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:49,167 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-28 14:31:49,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:31:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-28 14:31:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 14:31:49,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:49,168 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 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] [2020-10-28 14:31:49,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:31:49,169 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:49,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1160308644, now seen corresponding path program 17 times [2020-10-28 14:31:49,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:49,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010636130] [2020-10-28 14:31:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 14:31:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:55,133 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-28 14:31:55,310 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-28 14:31:55,506 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-28 14:31:55,705 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 14:31:56,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:56,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:56,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:56,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:56,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:56,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:31:56,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:56,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:56,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:56,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:56,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:56,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:56,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010636130] [2020-10-28 14:31:56,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:56,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:31:56,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214587944] [2020-10-28 14:31:56,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:31:56,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:56,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:31:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:56,421 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 20 states. [2020-10-28 14:31:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:59,495 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2020-10-28 14:31:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:31:59,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2020-10-28 14:31:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:59,504 INFO L225 Difference]: With dead ends: 236 [2020-10-28 14:31:59,504 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 14:31:59,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:31:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 14:31:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 183. [2020-10-28 14:31:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 14:31:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-10-28 14:31:59,529 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 145 [2020-10-28 14:31:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:59,530 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-10-28 14:31:59,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:31:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-10-28 14:31:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 14:31:59,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:59,531 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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] [2020-10-28 14:31:59,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:31:59,531 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1932398282, now seen corresponding path program 18 times [2020-10-28 14:31:59,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:59,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59477737] [2020-10-28 14:31:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-28 14:32:04,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:05,626 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-28 14:32:05,897 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-28 14:32:06,069 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-28 14:32:06,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:06,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:06,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:06,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:06,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:06,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:06,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:06,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:06,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:06,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:06,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:06,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:06,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59477737] [2020-10-28 14:32:06,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:06,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:32:06,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885364879] [2020-10-28 14:32:06,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:32:06,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:32:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:06,904 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 21 states. [2020-10-28 14:32:08,385 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-28 14:32:08,589 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-28 14:32:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:10,282 INFO L93 Difference]: Finished difference Result 311 states and 315 transitions. [2020-10-28 14:32:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:32:10,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-28 14:32:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:10,285 INFO L225 Difference]: With dead ends: 311 [2020-10-28 14:32:10,285 INFO L226 Difference]: Without dead ends: 307 [2020-10-28 14:32:10,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:32:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-28 14:32:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 212. [2020-10-28 14:32:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 14:32:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2020-10-28 14:32:10,310 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 146 [2020-10-28 14:32:10,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:10,310 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2020-10-28 14:32:10,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:32:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2020-10-28 14:32:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 14:32:10,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:10,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 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] [2020-10-28 14:32:10,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:32:10,311 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1508474280, now seen corresponding path program 19 times [2020-10-28 14:32:10,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:10,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278261487] [2020-10-28 14:32:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:10,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:15,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 14:32:15,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:15,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 14:32:15,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:15,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:15,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:32:15,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:15,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-28 14:32:15,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:16,175 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-28 14:32:16,328 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 14:32:16,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 28 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:17,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278261487] [2020-10-28 14:32:17,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:17,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:32:17,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154109888] [2020-10-28 14:32:17,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:32:17,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:32:17,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:17,114 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand 21 states. [2020-10-28 14:32:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:20,480 INFO L93 Difference]: Finished difference Result 274 states and 277 transitions. [2020-10-28 14:32:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:32:20,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 153 [2020-10-28 14:32:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:20,483 INFO L225 Difference]: With dead ends: 274 [2020-10-28 14:32:20,483 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 14:32:20,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:32:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 14:32:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-28 14:32:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-28 14:32:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2020-10-28 14:32:20,505 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 153 [2020-10-28 14:32:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:20,506 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2020-10-28 14:32:20,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:32:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2020-10-28 14:32:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 14:32:20,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:20,507 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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] [2020-10-28 14:32:20,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:32:20,507 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1848451966, now seen corresponding path program 20 times [2020-10-28 14:32:20,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:20,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254334455] [2020-10-28 14:32:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:20,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:25,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:25,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 14:32:25,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:25,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-28 14:32:25,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:25,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:25,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:32:25,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:25,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-28 14:32:25,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:26,650 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-28 14:32:26,818 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-28 14:32:27,015 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-28 14:32:27,223 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-28 14:32:27,451 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2020-10-28 14:32:27,591 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-28 14:32:28,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:28,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:28,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254334455] [2020-10-28 14:32:28,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:28,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:32:28,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485609252] [2020-10-28 14:32:28,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:32:28,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:28,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:32:28,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:28,428 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 22 states. [2020-10-28 14:32:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:31,852 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2020-10-28 14:32:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:32:31,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-10-28 14:32:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:31,855 INFO L225 Difference]: With dead ends: 245 [2020-10-28 14:32:31,855 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 14:32:31,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:32:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 14:32:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 192. [2020-10-28 14:32:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 14:32:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2020-10-28 14:32:31,881 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 154 [2020-10-28 14:32:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:31,882 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2020-10-28 14:32:31,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:32:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2020-10-28 14:32:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 14:32:31,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:31,883 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 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] [2020-10-28 14:32:31,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:32:31,883 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:31,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1790004784, now seen corresponding path program 21 times [2020-10-28 14:32:31,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:31,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748552901] [2020-10-28 14:32:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:37,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-28 14:32:37,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,102 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-28 14:32:38,285 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:32:38,450 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-28 14:32:38,640 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-28 14:32:39,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:39,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:39,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:39,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:39,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:39,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:39,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:39,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:39,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:39,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:39,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:39,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748552901] [2020-10-28 14:32:39,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:39,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:32:39,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355723355] [2020-10-28 14:32:39,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:32:39,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:39,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:32:39,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:39,667 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 22 states. [2020-10-28 14:32:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:43,359 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2020-10-28 14:32:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:32:43,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 155 [2020-10-28 14:32:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:43,362 INFO L225 Difference]: With dead ends: 244 [2020-10-28 14:32:43,362 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 14:32:43,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:32:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 14:32:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2020-10-28 14:32:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 14:32:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2020-10-28 14:32:43,388 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 155 [2020-10-28 14:32:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:43,388 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2020-10-28 14:32:43,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:32:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2020-10-28 14:32:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 14:32:43,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:43,389 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 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] [2020-10-28 14:32:43,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:32:43,389 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:43,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1829354446, now seen corresponding path program 22 times [2020-10-28 14:32:43,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:43,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777222112] [2020-10-28 14:32:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:43,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:48,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:48,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 14:32:48,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-28 14:32:48,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:48,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:32:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 14:32:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:49,558 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-28 14:32:50,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:50,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:50,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:50,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777222112] [2020-10-28 14:32:50,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:50,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:32:50,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279086436] [2020-10-28 14:32:50,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:32:50,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:50,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:32:50,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:50,771 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 22 states. [2020-10-28 14:32:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:54,397 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-28 14:32:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:32:54,397 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 162 [2020-10-28 14:32:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:54,400 INFO L225 Difference]: With dead ends: 261 [2020-10-28 14:32:54,400 INFO L226 Difference]: Without dead ends: 257 [2020-10-28 14:32:54,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:32:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-28 14:32:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 200. [2020-10-28 14:32:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 14:32:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2020-10-28 14:32:54,432 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 162 [2020-10-28 14:32:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:54,432 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2020-10-28 14:32:54,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:32:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2020-10-28 14:32:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 14:32:54,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:54,434 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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] [2020-10-28 14:32:54,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:32:54,434 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash -491101412, now seen corresponding path program 23 times [2020-10-28 14:32:54,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:54,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214161865] [2020-10-28 14:32:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:00,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-28 14:33:00,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:01,024 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-28 14:33:01,236 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-28 14:33:01,479 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-28 14:33:01,712 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-28 14:33:01,958 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-28 14:33:02,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:02,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:02,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:02,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:02,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:02,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:02,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:02,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:03,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214161865] [2020-10-28 14:33:03,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:03,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:33:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530883309] [2020-10-28 14:33:03,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:33:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:33:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:33:03,039 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 23 states. [2020-10-28 14:33:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:07,344 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2020-10-28 14:33:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:33:07,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 163 [2020-10-28 14:33:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:07,346 INFO L225 Difference]: With dead ends: 260 [2020-10-28 14:33:07,346 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 14:33:07,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:33:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 14:33:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 200. [2020-10-28 14:33:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 14:33:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2020-10-28 14:33:07,378 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 163 [2020-10-28 14:33:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:07,378 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2020-10-28 14:33:07,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:33:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2020-10-28 14:33:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 14:33:07,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:07,379 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 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] [2020-10-28 14:33:07,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:33:07,379 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:07,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1396870938, now seen corresponding path program 24 times [2020-10-28 14:33:07,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:07,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326928651] [2020-10-28 14:33:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:12,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:12,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 14:33:12,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:12,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 14:33:12,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:12,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:33:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-28 14:33:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:13,239 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 14:33:13,518 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-28 14:33:13,722 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-28 14:33:14,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:14,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:14,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:14,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:14,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:14,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:14,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:14,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:14,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 32 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:14,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326928651] [2020-10-28 14:33:14,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:14,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:33:14,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393337279] [2020-10-28 14:33:14,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:33:14,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:33:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:33:14,814 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 23 states. [2020-10-28 14:33:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:19,191 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-10-28 14:33:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:33:19,192 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 170 [2020-10-28 14:33:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:19,194 INFO L225 Difference]: With dead ends: 270 [2020-10-28 14:33:19,194 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 14:33:19,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:33:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 14:33:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-28 14:33:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 14:33:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-28 14:33:19,215 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 170 [2020-10-28 14:33:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:19,215 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-28 14:33:19,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:33:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-28 14:33:19,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 14:33:19,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:19,216 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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] [2020-10-28 14:33:19,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:33:19,217 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash -365557656, now seen corresponding path program 25 times [2020-10-28 14:33:19,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:19,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326586146] [2020-10-28 14:33:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5265 [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:24,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 14:33:24,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0