/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-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:29:43,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:29:43,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:29:43,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:29:43,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:29:43,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:29:43,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:29:43,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:29:43,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:29:43,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:29:43,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:29:43,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:29:43,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:29:43,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:29:43,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:29:43,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:29:43,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:29:43,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:29:43,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:29:43,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:29:43,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:29:43,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:29:43,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:29:43,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:29:43,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:29:43,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:29:43,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:29:43,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:29:43,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:29:43,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:29:43,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:29:43,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:29:43,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:29:43,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:29:43,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:29:43,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:29:43,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:29:43,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:29:43,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:29:43,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:29:43,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:29:43,174 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 14:29:43,227 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:29:43,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:29:43,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:29:43,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:29:43,232 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:29:43,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:29:43,233 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:29:43,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:29:43,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:29:43,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:29:43,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:29:43,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:29:43,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:29:43,235 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:29:43,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:29:43,235 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:29:43,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:29:43,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:29:43,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:29:43,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:29:43,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:29:43,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:29:43,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:29:43,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:29:43,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:29:43,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:29:43,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:29:43,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:29:43,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:29:43,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:29:43,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:29:43,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:29:43,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:29:43,751 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:29:43,752 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:29:43,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-28 14:29:43,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b63ba60c8/05cea9c05dc94df6993742de7b0f41b2/FLAGdc4a3c2cb [2020-10-28 14:29:44,559 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:29:44,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-28 14:29:44,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b63ba60c8/05cea9c05dc94df6993742de7b0f41b2/FLAGdc4a3c2cb [2020-10-28 14:29:44,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b63ba60c8/05cea9c05dc94df6993742de7b0f41b2 [2020-10-28 14:29:44,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:29:44,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:29:44,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:44,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:29:44,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:29:44,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:44" (1/1) ... [2020-10-28 14:29:44,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f28982f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:44, skipping insertion in model container [2020-10-28 14:29:44,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:29:44" (1/1) ... [2020-10-28 14:29:44,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:29:44,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:29:45,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:45,283 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:29:45,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:29:45,395 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:29:45,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:29:45 WrapperNode [2020-10-28 14:29:45,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:29:45,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:29:45,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:29:45,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:29:45,413 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 14:29:45,413 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 14:29:45,430 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 14:29:45,430 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 14:29:45,453 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 14:29:45,460 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 14:29:45,481 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 14:29:45,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:29:45,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:29:45,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:29:45,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:29:45,499 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 14:29:45,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:29:45,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:29:45,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:29:45,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:29:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:29:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:29:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:29:45,597 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:29:45,597 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:29:45,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:29:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:29:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:29:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:29:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:29:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:29:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:29:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:29:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:29:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:29:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:29:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:29:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:29:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:29:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:29:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:29:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:29:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:29:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:29:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:29:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:29:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:29:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:29:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:29:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:29:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:29:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:29:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:29:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:29:45,604 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:29:45,604 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:29:45,604 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:29:45,605 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:29:45,605 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:29:45,605 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:29:45,605 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:29:45,605 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:29:45,606 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:29:45,607 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:29:45,607 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:29:45,607 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:29:45,607 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:29:45,607 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:29:45,608 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:29:45,608 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:29:45,608 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:29:45,608 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:29:45,608 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:29:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:29:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:29:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:29:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:29:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:29:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:29:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:29:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:29:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:29:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:29:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:29:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:29:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:29:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:29:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:29:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:29:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:29:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:29:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:29:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:29:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:29:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:29:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:29:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:29:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:29:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:29:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:29:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:29:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:29:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:29:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:29:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:29:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:29:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:29:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:29:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:29:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:29:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:29:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:29:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:29:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:29:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:29:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:29:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:29:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:29:46,284 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:29:46,285 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 14:29:46,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:29:46 BoogieIcfgContainer [2020-10-28 14:29:46,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:29:46,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:29:46,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:29:46,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:29:46,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:29:44" (1/3) ... [2020-10-28 14:29:46,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383bf21b 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 14:29:46,293 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 14:29:46,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383bf21b 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 14:29:46,294 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 14:29:46,296 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2020-10-28 14:29:46,309 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:29:46,314 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:29:46,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:29:46,357 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:29:46,357 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:29:46,357 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:29:46,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:29:46,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:29:46,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:29:46,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:29:46,358 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:29:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 14:29:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:29:46,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:46,384 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] [2020-10-28 14:29:46,384 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1827068410, now seen corresponding path program 1 times [2020-10-28 14:29:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:46,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082908611] [2020-10-28 14:29:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:46,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:46,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:47,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:29:47,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:29:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-28 14:29:47,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:47,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:47,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:47,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:29:47,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:47,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:29:47,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:47,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:47,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:47,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:47,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:47,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:47,489 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 14:29:47,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082908611] [2020-10-28 14:29:47,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:47,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:29:47,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214012280] [2020-10-28 14:29:47,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:29:47,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:29:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:29:47,517 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-28 14:29:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:47,671 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-10-28 14:29:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:29:47,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 14:29:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:47,684 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:29:47,684 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:29:47,688 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 14:29:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:29:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:29:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:29:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-28 14:29:47,732 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 21 [2020-10-28 14:29:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:47,732 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-28 14:29:47,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:29:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-28 14:29:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:29:47,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:47,734 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] [2020-10-28 14:29:47,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:29:47,734 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1663384491, now seen corresponding path program 1 times [2020-10-28 14:29:47,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:47,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372090967] [2020-10-28 14:29:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:47,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:29:48,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-28 14:29:48,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:29:48,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:48,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:48,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:48,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:29:48,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:48,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:48,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:48,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:48,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:48,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:48,305 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 14:29:48,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372090967] [2020-10-28 14:29:48,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:48,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:29:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766808393] [2020-10-28 14:29:48,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:48,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:48,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:48,310 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-10-28 14:29:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:48,829 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-10-28 14:29:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:29:48,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 14:29:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:48,832 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:29:48,832 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:29:48,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:29:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:29:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-28 14:29:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:29:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-28 14:29:48,846 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 22 [2020-10-28 14:29:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:48,847 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-28 14:29:48,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-28 14:29:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:29:48,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:48,848 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] [2020-10-28 14:29:48,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:29:48,849 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:48,850 INFO L82 PathProgramCache]: Analyzing trace with hash 111622871, now seen corresponding path program 1 times [2020-10-28 14:29:48,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:48,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442179459] [2020-10-28 14:29:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:48,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:48,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:29:49,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:29:49,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-28 14:29:49,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:49,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:49,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:29:49,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:49,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:49,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:49,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:49,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:49,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:29:49,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:49,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:49,806 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 14:29:49,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442179459] [2020-10-28 14:29:49,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:49,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:29:49,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951068578] [2020-10-28 14:29:49,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:29:49,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:49,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:29:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:29:49,813 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 9 states. [2020-10-28 14:29:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:50,461 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2020-10-28 14:29:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:29:50,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:29:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:50,463 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:29:50,463 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:29:50,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:29:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:29:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2020-10-28 14:29:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:29:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-28 14:29:50,473 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2020-10-28 14:29:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:50,474 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-28 14:29:50,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:29:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-28 14:29:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:29:50,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:50,475 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] [2020-10-28 14:29:50,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:29:50,476 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash 791681241, now seen corresponding path program 1 times [2020-10-28 14:29:50,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:50,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009688095] [2020-10-28 14:29:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:50,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:50,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:29:51,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:29:51,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-28 14:29:51,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:29:51,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:51,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:29:51,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:51,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:51,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:51,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:51,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:29:51,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:51,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:51,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:51,294 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 14:29:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009688095] [2020-10-28 14:29:51,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:51,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:29:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666923181] [2020-10-28 14:29:51,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:29:51,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:29:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:29:51,298 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 9 states. [2020-10-28 14:29:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:51,786 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-28 14:29:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:29:51,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 14:29:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:51,788 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:29:51,788 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:29:51,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:29:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:29:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-28 14:29:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:29:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-28 14:29:51,798 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-28 14:29:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:51,798 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-28 14:29:51,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:29:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-28 14:29:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:29:51,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:51,800 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 14:29:51,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:29:51,800 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 19277548, now seen corresponding path program 1 times [2020-10-28 14:29:51,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:51,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726978999] [2020-10-28 14:29:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:51,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:51,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:52,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:52,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:29:52,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:29:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-28 14:29:52,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:52,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:29:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:29:52,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:53,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:53,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:53,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:53,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:53,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:53,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:53,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:53,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:53,034 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 14:29:53,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726978999] [2020-10-28 14:29:53,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:53,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:29:53,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883315855] [2020-10-28 14:29:53,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:29:53,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:53,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:29:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:29:53,037 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-10-28 14:29:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:53,557 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2020-10-28 14:29:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:29:53,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 14:29:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:53,559 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:29:53,559 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:29:53,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:29:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:29:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 48. [2020-10-28 14:29:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:29:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-10-28 14:29:53,570 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 23 [2020-10-28 14:29:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:53,570 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-10-28 14:29:53,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:29:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-10-28 14:29:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:29:53,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:53,571 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 14:29:53,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:29:53,572 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1794284910, now seen corresponding path program 1 times [2020-10-28 14:29:53,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:53,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6429884] [2020-10-28 14:29:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:53,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:53,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:29:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:29:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-28 14:29:54,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:29:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:29:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:29:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:54,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:54,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:54,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:54,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:29:54,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:54,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:54,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:54,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:54,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:54,153 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 14:29:54,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6429884] [2020-10-28 14:29:54,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:29:54,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:29:54,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752191776] [2020-10-28 14:29:54,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:29:54,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:54,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:29:54,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:29:54,156 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 6 states. [2020-10-28 14:29:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:54,447 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-28 14:29:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:29:54,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 14:29:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:54,449 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:29:54,449 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:29:54,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:29:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:29:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-10-28 14:29:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:29:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-10-28 14:29:54,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 23 [2020-10-28 14:29:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:54,459 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-10-28 14:29:54,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:29:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-10-28 14:29:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:29:54,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:54,461 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 14:29:54,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:29:54,461 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:54,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1378432434, now seen corresponding path program 1 times [2020-10-28 14:29:54,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:54,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524750435] [2020-10-28 14:29:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:54,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:29:55,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-28 14:29:55,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:29:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:55,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:29:55,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:29:55,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:55,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:55,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:55,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:55,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:55,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:29:55,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:55,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:55,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:56,001 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 14:29:56,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524750435] [2020-10-28 14:29:56,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:56,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:29:56,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43256965] [2020-10-28 14:29:56,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:29:56,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:29:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:29:56,006 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 11 states. [2020-10-28 14:29:57,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:29:57,017 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2020-10-28 14:29:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:29:57,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-28 14:29:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:29:57,019 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:29:57,019 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 14:29:57,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:29:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 14:29:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2020-10-28 14:29:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:29:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2020-10-28 14:29:57,033 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 25 [2020-10-28 14:29:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:29:57,033 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2020-10-28 14:29:57,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:29:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2020-10-28 14:29:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:29:57,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:29:57,034 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 14:29:57,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:29:57,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:29:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:29:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash 396574928, now seen corresponding path program 1 times [2020-10-28 14:29:57,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:29:57,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858058491] [2020-10-28 14:29:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:29:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:57,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:57,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:29:59,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:29:59,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-28 14:29:59,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:29:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:29:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:29:59,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:29:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:29:59,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:29:59,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:29:59,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:29:59,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:29:59,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:29:59,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:29:59,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:29:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:29:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:29:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:29:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:29:59,786 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 14:29:59,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858058491] [2020-10-28 14:29:59,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:29:59,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:29:59,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503586752] [2020-10-28 14:29:59,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:29:59,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:29:59,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:29:59,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:29:59,790 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 10 states. [2020-10-28 14:30:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:00,219 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-10-28 14:30:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:00,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-28 14:30:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:00,221 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:30:00,221 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:30:00,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:30:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-10-28 14:30:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:30:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2020-10-28 14:30:00,233 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 25 [2020-10-28 14:30:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:00,233 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2020-10-28 14:30:00,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2020-10-28 14:30:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:30:00,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:00,235 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 14:30:00,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:30:00,235 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:00,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1076633298, now seen corresponding path program 1 times [2020-10-28 14:30:00,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:00,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527931316] [2020-10-28 14:30:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:00,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:02,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:30:02,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:02,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-28 14:30:02,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:02,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:30:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:02,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:02,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:02,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:02,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:02,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:02,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:02,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:02,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:02,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:02,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:02,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:02,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:02,535 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 14:30:02,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527931316] [2020-10-28 14:30:02,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:02,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:02,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013359755] [2020-10-28 14:30:02,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:02,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:02,544 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 12 states. [2020-10-28 14:30:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:03,243 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-28 14:30:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:30:03,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-28 14:30:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:03,245 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:30:03,245 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:30:03,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:30:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:30:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-28 14:30:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:30:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-10-28 14:30:03,256 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 25 [2020-10-28 14:30:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:03,256 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-10-28 14:30:03,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-10-28 14:30:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:30:03,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:03,257 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 14:30:03,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:30:03,258 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash 243059799, now seen corresponding path program 1 times [2020-10-28 14:30:03,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:03,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050665792] [2020-10-28 14:30:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:03,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:03,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:04,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:05,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:06,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:08,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:08,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:30:08,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:30:08,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 14:30:08,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:08,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:30:08,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:08,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:08,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:08,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:08,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:08,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:08,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:08,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:08,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:08,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:08,596 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 14:30:08,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050665792] [2020-10-28 14:30:08,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:08,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19192991] [2020-10-28 14:30:08,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:08,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:08,600 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 11 states. [2020-10-28 14:30:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:10,127 INFO L93 Difference]: Finished difference Result 127 states and 162 transitions. [2020-10-28 14:30:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:30:10,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-28 14:30:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:10,132 INFO L225 Difference]: With dead ends: 127 [2020-10-28 14:30:10,132 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:30:10,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:30:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:30:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 62. [2020-10-28 14:30:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:30:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-10-28 14:30:10,157 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 26 [2020-10-28 14:30:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:10,158 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-10-28 14:30:10,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-10-28 14:30:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:30:10,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:10,160 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 14:30:10,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:30:10,163 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2018067161, now seen corresponding path program 1 times [2020-10-28 14:30:10,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:10,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683219283] [2020-10-28 14:30:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:10,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:10,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:11,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:13,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:13,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:30:13,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:30:13,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3148 [2020-10-28 14:30:13,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:13,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:30:13,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:13,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:13,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:13,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:13,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:13,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:13,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:13,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:13,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:13,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:13,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:13,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:13,703 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 14:30:13,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683219283] [2020-10-28 14:30:13,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:13,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354036961] [2020-10-28 14:30:13,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:13,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:13,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:13,706 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand 10 states. [2020-10-28 14:30:14,613 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-28 14:30:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:14,766 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-10-28 14:30:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:30:14,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:30:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:14,768 INFO L225 Difference]: With dead ends: 124 [2020-10-28 14:30:14,768 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 14:30:14,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 14:30:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 57. [2020-10-28 14:30:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:30:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-10-28 14:30:14,779 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 26 [2020-10-28 14:30:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:14,779 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-10-28 14:30:14,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2020-10-28 14:30:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:30:14,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:14,781 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] [2020-10-28 14:30:14,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:30:14,781 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1672684518, now seen corresponding path program 1 times [2020-10-28 14:30:14,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:14,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410394507] [2020-10-28 14:30:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:14,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:14,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:14,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:30:14,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:14,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 14:30:14,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:14,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:30:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:30:14,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:15,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:15,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:15,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:15,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:15,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:15,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:15,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:15,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:15,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:15,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:15,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410394507] [2020-10-28 14:30:15,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:15,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:30:15,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533854092] [2020-10-28 14:30:15,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:30:15,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:15,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:30:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:30:15,026 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 7 states. [2020-10-28 14:30:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:15,341 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-10-28 14:30:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:30:15,342 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 14:30:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:15,342 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:30:15,343 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:30:15,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 14:30:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:30:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 14:30:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:30:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-28 14:30:15,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 32 [2020-10-28 14:30:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:15,353 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-28 14:30:15,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:30:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-28 14:30:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:30:15,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:15,354 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:30:15,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:30:15,355 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash -331841837, now seen corresponding path program 1 times [2020-10-28 14:30:15,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:15,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088333434] [2020-10-28 14:30:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:15,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:16,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:16,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:30:16,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1573 [2020-10-28 14:30:16,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:16,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:30:16,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:17,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:17,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:17,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:17,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:17,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:17,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:17,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:17,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:17,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:17,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:17,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:17,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:17,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088333434] [2020-10-28 14:30:17,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:17,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:17,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145884699] [2020-10-28 14:30:17,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:17,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:17,311 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 11 states. [2020-10-28 14:30:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:18,369 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2020-10-28 14:30:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:30:18,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-28 14:30:18,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:18,370 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:30:18,370 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:30:18,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:30:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:30:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2020-10-28 14:30:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:30:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-28 14:30:18,391 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 35 [2020-10-28 14:30:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:18,391 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-28 14:30:18,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-28 14:30:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:30:18,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:18,398 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] [2020-10-28 14:30:18,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:30:18,398 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:18,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1443165525, now seen corresponding path program 1 times [2020-10-28 14:30:18,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:18,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241554753] [2020-10-28 14:30:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:18,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:19,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:19,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:21,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:23,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:23,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:30:23,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:30:23,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 14:30:23,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:23,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:23,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:30:23,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 14:30:23,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:30:23,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:23,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:23,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:23,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:23,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:23,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:23,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:23,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:23,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:30:23,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241554753] [2020-10-28 14:30:23,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:23,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:30:23,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928224884] [2020-10-28 14:30:23,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:30:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:30:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:30:23,613 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 7 states. [2020-10-28 14:30:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:23,994 INFO L93 Difference]: Finished difference Result 125 states and 161 transitions. [2020-10-28 14:30:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:23,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 14:30:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:23,997 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:30:23,997 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 14:30:23,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 14:30:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-10-28 14:30:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:30:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2020-10-28 14:30:24,012 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 35 [2020-10-28 14:30:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:24,012 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2020-10-28 14:30:24,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:30:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2020-10-28 14:30:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:30:24,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:24,014 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] [2020-10-28 14:30:24,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:30:24,014 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2123223895, now seen corresponding path program 1 times [2020-10-28 14:30:24,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:24,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042995406] [2020-10-28 14:30:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:24,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:25,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:25,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:25,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:25,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:26,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:26,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:28,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:28,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:30:28,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:30:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4933 [2020-10-28 14:30:28,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:28,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:28,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:30:28,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:29,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:29,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:29,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:29,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:29,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:29,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:29,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:29,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:29,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:29,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:29,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042995406] [2020-10-28 14:30:29,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:29,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:29,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836050961] [2020-10-28 14:30:29,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:29,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:29,373 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 12 states. [2020-10-28 14:30:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:30,438 INFO L93 Difference]: Finished difference Result 147 states and 192 transitions. [2020-10-28 14:30:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:30:30,439 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:30:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:30,441 INFO L225 Difference]: With dead ends: 147 [2020-10-28 14:30:30,441 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 14:30:30,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:30:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 14:30:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2020-10-28 14:30:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:30:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-10-28 14:30:30,465 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 35 [2020-10-28 14:30:30,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:30,466 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-10-28 14:30:30,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-10-28 14:30:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:30:30,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:30,467 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:30:30,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:30:30,467 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:30,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1334779298, now seen corresponding path program 1 times [2020-10-28 14:30:30,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:30,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67854864] [2020-10-28 14:30:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:30,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:30,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:30,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:30,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:31,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:31,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:34,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:34,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:34,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:35,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:35,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:30:35,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 14:30:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 14:30:35,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:35,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:30:35,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:30:35,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:35,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:35,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:35,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:35,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:35,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:35,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:35,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:35,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67854864] [2020-10-28 14:30:35,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:35,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:35,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456684550] [2020-10-28 14:30:35,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:35,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:35,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:35,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:35,856 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand 12 states. [2020-10-28 14:30:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:37,438 INFO L93 Difference]: Finished difference Result 206 states and 264 transitions. [2020-10-28 14:30:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:30:37,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-28 14:30:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:37,441 INFO L225 Difference]: With dead ends: 206 [2020-10-28 14:30:37,442 INFO L226 Difference]: Without dead ends: 202 [2020-10-28 14:30:37,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:30:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-28 14:30:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 110. [2020-10-28 14:30:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:30:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2020-10-28 14:30:37,461 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 36 [2020-10-28 14:30:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:37,461 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2020-10-28 14:30:37,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2020-10-28 14:30:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:30:37,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:37,462 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:30:37,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:30:37,462 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1475327908, now seen corresponding path program 1 times [2020-10-28 14:30:37,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:37,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157856924] [2020-10-28 14:30:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:37,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:37,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:42,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:42,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:30:42,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 14:30:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:30:42,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:42,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:30:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:42,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:42,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:42,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:42,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:42,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:42,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157856924] [2020-10-28 14:30:42,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:42,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:42,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007256362] [2020-10-28 14:30:42,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:42,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:42,931 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand 13 states. [2020-10-28 14:30:44,461 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-28 14:30:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:44,805 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2020-10-28 14:30:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:30:44,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-28 14:30:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:44,808 INFO L225 Difference]: With dead ends: 242 [2020-10-28 14:30:44,808 INFO L226 Difference]: Without dead ends: 238 [2020-10-28 14:30:44,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:30:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-28 14:30:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2020-10-28 14:30:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:30:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 155 transitions. [2020-10-28 14:30:44,831 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 155 transitions. Word has length 36 [2020-10-28 14:30:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:44,831 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 155 transitions. [2020-10-28 14:30:44,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:30:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 155 transitions. [2020-10-28 14:30:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:30:44,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:44,833 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] [2020-10-28 14:30:44,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:30:44,833 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1005453313, now seen corresponding path program 1 times [2020-10-28 14:30:44,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:44,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706225624] [2020-10-28 14:30:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:44,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:44,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:44,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3397 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:30:48,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:48,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:48,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:48,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:48,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:48,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706225624] [2020-10-28 14:30:48,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:48,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:48,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129095997] [2020-10-28 14:30:48,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:48,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:48,412 INFO L87 Difference]: Start difference. First operand 121 states and 155 transitions. Second operand 10 states. [2020-10-28 14:30:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:49,295 INFO L93 Difference]: Finished difference Result 195 states and 249 transitions. [2020-10-28 14:30:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:30:49,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 14:30:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:49,298 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:30:49,298 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 14:30:49,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:30:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 14:30:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 115. [2020-10-28 14:30:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 14:30:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2020-10-28 14:30:49,317 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 37 [2020-10-28 14:30:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:49,317 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2020-10-28 14:30:49,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2020-10-28 14:30:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:30:49,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:49,318 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:30:49,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:30:49,318 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1516615034, now seen corresponding path program 2 times [2020-10-28 14:30:49,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:49,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862368395] [2020-10-28 14:30:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:49,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:49,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:50,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:51,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:51,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:30:51,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:51,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2433 [2020-10-28 14:30:51,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:51,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:51,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:30:51,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:51,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:30:51,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:52,148 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-28 14:30:52,453 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-28 14:30:52,630 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-28 14:30:53,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:53,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:53,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:53,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:53,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:53,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:53,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:53,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:53,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:53,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:53,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:53,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:53,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862368395] [2020-10-28 14:30:53,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:53,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:53,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026461639] [2020-10-28 14:30:53,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:53,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:53,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:53,038 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand 13 states. [2020-10-28 14:30:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:54,376 INFO L93 Difference]: Finished difference Result 217 states and 285 transitions. [2020-10-28 14:30:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:30:54,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 14:30:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:54,379 INFO L225 Difference]: With dead ends: 217 [2020-10-28 14:30:54,379 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 14:30:54,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:30:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 14:30:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 157. [2020-10-28 14:30:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 14:30:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2020-10-28 14:30:54,403 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 38 [2020-10-28 14:30:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:54,403 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2020-10-28 14:30:54,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:30:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2020-10-28 14:30:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:30:54,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:54,404 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:30:54,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:30:54,404 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -323286530, now seen corresponding path program 2 times [2020-10-28 14:30:54,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:54,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494973616] [2020-10-28 14:30:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:54,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:54,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:56,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:59,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:30:59,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:30:59,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:30:59,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:59,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:59,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:30:59,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:59,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:30:59,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:59,757 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-28 14:31:00,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:00,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:00,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:00,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:00,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:00,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:00,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:00,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:00,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:00,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494973616] [2020-10-28 14:31:00,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:00,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:00,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500855207] [2020-10-28 14:31:00,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:00,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:00,070 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand 14 states. [2020-10-28 14:31:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:01,425 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2020-10-28 14:31:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:31:01,425 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:31:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:01,427 INFO L225 Difference]: With dead ends: 214 [2020-10-28 14:31:01,427 INFO L226 Difference]: Without dead ends: 189 [2020-10-28 14:31:01,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:31:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-28 14:31:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 123. [2020-10-28 14:31:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 14:31:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2020-10-28 14:31:01,449 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 38 [2020-10-28 14:31:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:01,450 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2020-10-28 14:31:01,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2020-10-28 14:31:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:31:01,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:01,451 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:31:01,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:31:01,451 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2004906059, now seen corresponding path program 1 times [2020-10-28 14:31:01,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:01,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227902839] [2020-10-28 14:31:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:01,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:03,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:04,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:05,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:06,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:06,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:31:06,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:31:06,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:31:06,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:06,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:06,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:31:06,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:06,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:31:06,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:06,819 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-28 14:31:06,990 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-28 14:31:07,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:07,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:07,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:07,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:07,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:07,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227902839] [2020-10-28 14:31:07,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:07,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:31:07,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155758320] [2020-10-28 14:31:07,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:31:07,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:07,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:31:07,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:07,445 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand 15 states. [2020-10-28 14:31:08,019 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-28 14:31:08,162 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-28 14:31:08,374 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 14:31:08,763 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 14:31:09,615 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 14:31:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:10,080 INFO L93 Difference]: Finished difference Result 265 states and 346 transitions. [2020-10-28 14:31:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:31:10,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-28 14:31:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:10,083 INFO L225 Difference]: With dead ends: 265 [2020-10-28 14:31:10,083 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 14:31:10,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:31:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 14:31:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 137. [2020-10-28 14:31:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 14:31:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2020-10-28 14:31:10,115 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 39 [2020-10-28 14:31:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:10,115 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2020-10-28 14:31:10,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:31:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2020-10-28 14:31:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:31:10,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:10,116 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:31:10,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:31:10,117 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:10,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1495432969, now seen corresponding path program 1 times [2020-10-28 14:31:10,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:10,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256876584] [2020-10-28 14:31:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:13,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:31:15,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:31:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:15,530 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-28 14:31:15,668 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 14:31:16,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:16,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:16,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:16,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:16,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:16,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:16,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:16,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:16,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256876584] [2020-10-28 14:31:16,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:16,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:31:16,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654101091] [2020-10-28 14:31:16,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:31:16,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:31:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:16,329 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand 16 states. [2020-10-28 14:31:17,141 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 14:31:17,498 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-28 14:31:18,289 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-28 14:31:18,745 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-28 14:31:19,136 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-28 14:31:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:19,766 INFO L93 Difference]: Finished difference Result 304 states and 399 transitions. [2020-10-28 14:31:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:31:19,770 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-28 14:31:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:19,772 INFO L225 Difference]: With dead ends: 304 [2020-10-28 14:31:19,772 INFO L226 Difference]: Without dead ends: 300 [2020-10-28 14:31:19,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=340, Invalid=1382, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:31:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-28 14:31:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 172. [2020-10-28 14:31:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 14:31:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 232 transitions. [2020-10-28 14:31:19,808 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 232 transitions. Word has length 39 [2020-10-28 14:31:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:19,808 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 232 transitions. [2020-10-28 14:31:19,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:31:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 232 transitions. [2020-10-28 14:31:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:31:19,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:19,810 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:31:19,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:31:19,810 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1919876454, now seen corresponding path program 1 times [2020-10-28 14:31:19,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:19,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892379108] [2020-10-28 14:31:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:19,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:24,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:24,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:31:24,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:31:24,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:31:24,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:24,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:24,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:24,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:24,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:31:24,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:25,182 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-28 14:31:25,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:25,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:25,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:25,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:25,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:25,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:25,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:25,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:25,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892379108] [2020-10-28 14:31:25,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:25,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:25,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456675859] [2020-10-28 14:31:25,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:25,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:25,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:25,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:25,469 INFO L87 Difference]: Start difference. First operand 172 states and 232 transitions. Second operand 12 states. [2020-10-28 14:31:25,941 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-28 14:31:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:26,921 INFO L93 Difference]: Finished difference Result 294 states and 392 transitions. [2020-10-28 14:31:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:31:26,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-28 14:31:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:26,924 INFO L225 Difference]: With dead ends: 294 [2020-10-28 14:31:26,925 INFO L226 Difference]: Without dead ends: 290 [2020-10-28 14:31:26,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:31:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-28 14:31:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 167. [2020-10-28 14:31:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 14:31:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 224 transitions. [2020-10-28 14:31:26,957 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 224 transitions. Word has length 40 [2020-10-28 14:31:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:26,957 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 224 transitions. [2020-10-28 14:31:26,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 224 transitions. [2020-10-28 14:31:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:31:26,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:26,958 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:31:26,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:31:26,959 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:26,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1175410317, now seen corresponding path program 3 times [2020-10-28 14:31:26,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:26,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411306538] [2020-10-28 14:31:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:28,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:29,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:30,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:30,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:31:30,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:30,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3495 [2020-10-28 14:31:30,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:30,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:31:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:31:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:31,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:31,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:31,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:31,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411306538] [2020-10-28 14:31:31,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:31,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:31,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415118412] [2020-10-28 14:31:31,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:31,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:31,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:31,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:31,240 INFO L87 Difference]: Start difference. First operand 167 states and 224 transitions. Second operand 14 states. [2020-10-28 14:31:31,787 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-28 14:31:31,988 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-28 14:31:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:32,832 INFO L93 Difference]: Finished difference Result 333 states and 437 transitions. [2020-10-28 14:31:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:31:32,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:31:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:32,835 INFO L225 Difference]: With dead ends: 333 [2020-10-28 14:31:32,835 INFO L226 Difference]: Without dead ends: 304 [2020-10-28 14:31:32,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:31:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-28 14:31:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 209. [2020-10-28 14:31:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 14:31:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 280 transitions. [2020-10-28 14:31:32,875 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 280 transitions. Word has length 41 [2020-10-28 14:31:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:32,875 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 280 transitions. [2020-10-28 14:31:32,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 280 transitions. [2020-10-28 14:31:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:31:32,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:32,876 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:31:32,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:31:32,877 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1279655415, now seen corresponding path program 3 times [2020-10-28 14:31:32,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:32,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468695295] [2020-10-28 14:31:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:33,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:34,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:38,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:31:38,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:31:38,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-28 14:31:38,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:38,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:31:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:31:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:38,408 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-28 14:31:38,615 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-28 14:31:38,831 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-28 14:31:39,020 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-28 14:31:39,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:39,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:39,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:39,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:39,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:39,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:39,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:39,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:39,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:39,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468695295] [2020-10-28 14:31:39,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:39,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:31:39,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900994779] [2020-10-28 14:31:39,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:31:39,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:39,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:31:39,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:31:39,351 INFO L87 Difference]: Start difference. First operand 209 states and 280 transitions. Second operand 17 states. [2020-10-28 14:31:40,064 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-28 14:31:40,375 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-28 14:31:40,638 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-28 14:31:41,029 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-28 14:31:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:41,798 INFO L93 Difference]: Finished difference Result 410 states and 530 transitions. [2020-10-28 14:31:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:31:41,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-28 14:31:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:41,802 INFO L225 Difference]: With dead ends: 410 [2020-10-28 14:31:41,802 INFO L226 Difference]: Without dead ends: 373 [2020-10-28 14:31:41,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:31:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-28 14:31:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 215. [2020-10-28 14:31:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 14:31:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 290 transitions. [2020-10-28 14:31:41,839 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 290 transitions. Word has length 41 [2020-10-28 14:31:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:41,840 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 290 transitions. [2020-10-28 14:31:41,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:31:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 290 transitions. [2020-10-28 14:31:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:31:41,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:41,841 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:31:41,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:31:41,841 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:41,842 INFO L82 PathProgramCache]: Analyzing trace with hash -885941370, now seen corresponding path program 1 times [2020-10-28 14:31:41,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:41,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809685368] [2020-10-28 14:31:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:42,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:43,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:44,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:45,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:45,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:46,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:47,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:47,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:31:47,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:31:47,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5195 [2020-10-28 14:31:47,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:47,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:47,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:31:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:31:47,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:47,516 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-28 14:31:47,828 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 14:31:48,124 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-28 14:31:48,302 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 14:31:48,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:48,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:48,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:48,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:48,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:48,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:48,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:48,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:48,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:48,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809685368] [2020-10-28 14:31:48,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:48,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:31:48,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89920918] [2020-10-28 14:31:48,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:31:48,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:48,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:31:48,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:31:48,751 INFO L87 Difference]: Start difference. First operand 215 states and 290 transitions. Second operand 17 states. [2020-10-28 14:31:49,245 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-28 14:31:49,554 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-28 14:31:49,834 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-28 14:31:50,173 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-28 14:31:50,576 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-28 14:31:51,022 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-28 14:31:52,271 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-28 14:31:52,562 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-28 14:31:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:52,849 INFO L93 Difference]: Finished difference Result 417 states and 540 transitions. [2020-10-28 14:31:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:31:52,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-28 14:31:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:52,855 INFO L225 Difference]: With dead ends: 417 [2020-10-28 14:31:52,856 INFO L226 Difference]: Without dead ends: 413 [2020-10-28 14:31:52,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:31:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-28 14:31:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 245. [2020-10-28 14:31:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-28 14:31:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 329 transitions. [2020-10-28 14:31:52,908 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 329 transitions. Word has length 42 [2020-10-28 14:31:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:52,908 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 329 transitions. [2020-10-28 14:31:52,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:31:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 329 transitions. [2020-10-28 14:31:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:31:52,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:52,909 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:31:52,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:31:52,910 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:52,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1683402762, now seen corresponding path program 2 times [2020-10-28 14:31:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:52,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842312881] [2020-10-28 14:31:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:53,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:53,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:55,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:57,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:58,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:58,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:31:58,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:31:58,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 14:31:58,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:58,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:31:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:31:58,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:58,288 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-10-28 14:31:58,401 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-28 14:31:58,550 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-28 14:31:58,733 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-28 14:31:58,931 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-28 14:31:59,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:59,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:59,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:59,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:59,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:59,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:59,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:59,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:59,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:59,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:59,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:59,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:59,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842312881] [2020-10-28 14:31:59,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:59,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:31:59,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912154874] [2020-10-28 14:31:59,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:31:59,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:59,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:31:59,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:31:59,354 INFO L87 Difference]: Start difference. First operand 245 states and 329 transitions. Second operand 17 states. [2020-10-28 14:31:59,738 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-28 14:32:00,086 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 63 [2020-10-28 14:32:00,319 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 52 [2020-10-28 14:32:00,644 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-28 14:32:00,919 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-28 14:32:01,327 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-28 14:32:01,605 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-10-28 14:32:01,904 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-28 14:32:02,163 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-28 14:32:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:03,649 INFO L93 Difference]: Finished difference Result 548 states and 711 transitions. [2020-10-28 14:32:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:32:03,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-28 14:32:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:03,654 INFO L225 Difference]: With dead ends: 548 [2020-10-28 14:32:03,655 INFO L226 Difference]: Without dead ends: 544 [2020-10-28 14:32:03,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:32:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-10-28 14:32:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 247. [2020-10-28 14:32:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 14:32:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 333 transitions. [2020-10-28 14:32:03,709 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 333 transitions. Word has length 42 [2020-10-28 14:32:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:03,709 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 333 transitions. [2020-10-28 14:32:03,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:32:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 333 transitions. [2020-10-28 14:32:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:32:03,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:03,710 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:32:03,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:32:03,711 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1551716094, now seen corresponding path program 2 times [2020-10-28 14:32:03,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:03,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61410800] [2020-10-28 14:32:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:05,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:09,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:32:09,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:32:09,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5295 [2020-10-28 14:32:09,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:09,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:32:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:32:09,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:09,337 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-28 14:32:09,478 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-28 14:32:09,593 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-28 14:32:09,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:09,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:09,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:09,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:09,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:09,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:09,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:09,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:09,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:09,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:09,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:09,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61410800] [2020-10-28 14:32:09,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:09,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434480227] [2020-10-28 14:32:09,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:09,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:09,961 INFO L87 Difference]: Start difference. First operand 247 states and 333 transitions. Second operand 13 states. [2020-10-28 14:32:10,524 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-28 14:32:10,849 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-28 14:32:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:11,480 INFO L93 Difference]: Finished difference Result 346 states and 456 transitions. [2020-10-28 14:32:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:11,481 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-28 14:32:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:11,483 INFO L225 Difference]: With dead ends: 346 [2020-10-28 14:32:11,483 INFO L226 Difference]: Without dead ends: 342 [2020-10-28 14:32:11,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:32:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-28 14:32:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 247. [2020-10-28 14:32:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 14:32:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 332 transitions. [2020-10-28 14:32:11,545 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 332 transitions. Word has length 42 [2020-10-28 14:32:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:11,545 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 332 transitions. [2020-10-28 14:32:11,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 332 transitions. [2020-10-28 14:32:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:32:11,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:11,547 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:32:11,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:32:11,547 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:11,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1748535655, now seen corresponding path program 3 times [2020-10-28 14:32:11,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:11,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904668281] [2020-10-28 14:32:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:12,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:13,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:16,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:32:16,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:32:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 14:32:16,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:16,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:32:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:32:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:17,058 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-28 14:32:17,416 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-28 14:32:17,700 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-28 14:32:17,935 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-28 14:32:18,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:18,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:18,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:18,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904668281] [2020-10-28 14:32:18,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:18,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:32:18,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050153051] [2020-10-28 14:32:18,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:32:18,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:32:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:32:18,426 INFO L87 Difference]: Start difference. First operand 247 states and 332 transitions. Second operand 17 states. [2020-10-28 14:32:18,875 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-28 14:32:19,137 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2020-10-28 14:32:19,390 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-10-28 14:32:19,689 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-28 14:32:20,012 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-28 14:32:20,380 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-28 14:32:20,645 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2020-10-28 14:32:20,860 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-28 14:32:21,116 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-28 14:32:21,566 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-28 14:32:21,973 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-28 14:32:22,152 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 14:32:22,466 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 14:32:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:22,863 INFO L93 Difference]: Finished difference Result 377 states and 494 transitions. [2020-10-28 14:32:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:32:22,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-28 14:32:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:22,866 INFO L225 Difference]: With dead ends: 377 [2020-10-28 14:32:22,867 INFO L226 Difference]: Without dead ends: 373 [2020-10-28 14:32:22,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:32:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-28 14:32:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 213. [2020-10-28 14:32:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 14:32:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 286 transitions. [2020-10-28 14:32:22,915 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 286 transitions. Word has length 43 [2020-10-28 14:32:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:22,916 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 286 transitions. [2020-10-28 14:32:22,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:32:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 286 transitions. [2020-10-28 14:32:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:32:22,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:22,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:22,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:32:22,917 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1915088616, now seen corresponding path program 4 times [2020-10-28 14:32:22,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:22,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932164139] [2020-10-28 14:32:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:22,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:23,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:32:23,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:23,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 936 [2020-10-28 14:32:23,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:23,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:23,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:32:23,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:24,428 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-28 14:32:24,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:24,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:24,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:24,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:24,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932164139] [2020-10-28 14:32:24,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:24,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:24,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995427692] [2020-10-28 14:32:24,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:24,715 INFO L87 Difference]: Start difference. First operand 213 states and 286 transitions. Second operand 10 states. [2020-10-28 14:32:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:25,499 INFO L93 Difference]: Finished difference Result 312 states and 405 transitions. [2020-10-28 14:32:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:32:25,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 14:32:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:25,502 INFO L225 Difference]: With dead ends: 312 [2020-10-28 14:32:25,502 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 14:32:25,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:32:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 14:32:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-28 14:32:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 14:32:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2020-10-28 14:32:25,565 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 45 [2020-10-28 14:32:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:25,565 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2020-10-28 14:32:25,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2020-10-28 14:32:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:32:25,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:25,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 14:32:25,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:32:25,567 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1185702655, now seen corresponding path program 5 times [2020-10-28 14:32:25,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:25,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726471155] [2020-10-28 14:32:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:26,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:28,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:28,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:32:28,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:28,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3233 [2020-10-28 14:32:28,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:28,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:28,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:28,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:32:28,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:29,299 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-28 14:32:29,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:29,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:29,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:29,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:29,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:29,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:29,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:29,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:29,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:29,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:29,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:29,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726471155] [2020-10-28 14:32:29,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:29,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:32:29,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107117596] [2020-10-28 14:32:29,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:32:29,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:32:29,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:29,816 INFO L87 Difference]: Start difference. First operand 207 states and 274 transitions. Second operand 16 states. [2020-10-28 14:32:30,242 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-10-28 14:32:30,499 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 41 [2020-10-28 14:32:30,750 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 42 [2020-10-28 14:32:31,060 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2020-10-28 14:32:31,328 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-28 14:32:31,707 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2020-10-28 14:32:31,903 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-28 14:32:32,677 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-28 14:32:32,916 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 14:32:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:33,576 INFO L93 Difference]: Finished difference Result 413 states and 531 transitions. [2020-10-28 14:32:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:32:33,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-28 14:32:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:33,578 INFO L225 Difference]: With dead ends: 413 [2020-10-28 14:32:33,578 INFO L226 Difference]: Without dead ends: 384 [2020-10-28 14:32:33,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:32:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-28 14:32:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 301. [2020-10-28 14:32:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-28 14:32:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 392 transitions. [2020-10-28 14:32:33,646 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 392 transitions. Word has length 48 [2020-10-28 14:32:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:33,646 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 392 transitions. [2020-10-28 14:32:33,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:32:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 392 transitions. [2020-10-28 14:32:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:32:33,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:33,647 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:32:33,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:32:33,648 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:33,648 INFO L82 PathProgramCache]: Analyzing trace with hash -654198909, now seen corresponding path program 4 times [2020-10-28 14:32:33,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:33,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641802034] [2020-10-28 14:32:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:37,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:32:38,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:39,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:39,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:39,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:39,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:39,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:39,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641802034] [2020-10-28 14:32:39,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:39,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:32:39,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722754681] [2020-10-28 14:32:39,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:32:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:39,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:32:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:39,273 INFO L87 Difference]: Start difference. First operand 301 states and 392 transitions. Second operand 15 states. [2020-10-28 14:32:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:40,921 INFO L93 Difference]: Finished difference Result 499 states and 639 transitions. [2020-10-28 14:32:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:32:40,922 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-28 14:32:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:40,924 INFO L225 Difference]: With dead ends: 499 [2020-10-28 14:32:40,924 INFO L226 Difference]: Without dead ends: 462 [2020-10-28 14:32:40,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:32:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-28 14:32:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 369. [2020-10-28 14:32:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-28 14:32:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 473 transitions. [2020-10-28 14:32:41,016 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 473 transitions. Word has length 48 [2020-10-28 14:32:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 473 transitions. [2020-10-28 14:32:41,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:32:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 473 transitions. [2020-10-28 14:32:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:32:41,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:41,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:41,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:32:41,018 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:41,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1128466268, now seen corresponding path program 4 times [2020-10-28 14:32:41,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:41,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763200862] [2020-10-28 14:32:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:41,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:42,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:43,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:32:46,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,265 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-10-28 14:32:46,404 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-10-28 14:32:46,657 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-10-28 14:32:46,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:46,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:46,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:46,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:46,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:46,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:47,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763200862] [2020-10-28 14:32:47,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:47,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:47,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58356267] [2020-10-28 14:32:47,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:47,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:47,006 INFO L87 Difference]: Start difference. First operand 369 states and 473 transitions. Second operand 13 states. [2020-10-28 14:32:47,267 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-28 14:32:47,849 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2020-10-28 14:32:48,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:48,815 INFO L93 Difference]: Finished difference Result 445 states and 564 transitions. [2020-10-28 14:32:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:32:48,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-28 14:32:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:48,818 INFO L225 Difference]: With dead ends: 445 [2020-10-28 14:32:48,819 INFO L226 Difference]: Without dead ends: 441 [2020-10-28 14:32:48,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:32:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-28 14:32:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 353. [2020-10-28 14:32:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-28 14:32:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 452 transitions. [2020-10-28 14:32:48,897 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 452 transitions. Word has length 49 [2020-10-28 14:32:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:48,897 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 452 transitions. [2020-10-28 14:32:48,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 452 transitions. [2020-10-28 14:32:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:32:48,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:48,899 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:32:48,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:32:48,899 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash 701854648, now seen corresponding path program 6 times [2020-10-28 14:32:48,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:48,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252966260] [2020-10-28 14:32:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:50,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:54,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:54,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:32:54,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:54,447 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-28 14:32:54,693 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-28 14:32:55,080 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 14:32:55,573 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-28 14:32:56,260 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-10-28 14:32:56,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:56,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:56,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:56,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:56,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252966260] [2020-10-28 14:32:56,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:56,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:32:56,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639201453] [2020-10-28 14:32:56,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:32:56,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:32:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:32:56,835 INFO L87 Difference]: Start difference. First operand 353 states and 452 transitions. Second operand 18 states. [2020-10-28 14:32:57,325 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 66 [2020-10-28 14:32:57,598 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-28 14:32:57,773 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-28 14:32:58,275 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-28 14:32:58,922 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2020-10-28 14:32:59,439 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-28 14:33:00,017 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2020-10-28 14:33:00,455 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-10-28 14:33:01,048 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-28 14:33:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:02,552 INFO L93 Difference]: Finished difference Result 633 states and 804 transitions. [2020-10-28 14:33:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:33:02,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-28 14:33:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:02,555 INFO L225 Difference]: With dead ends: 633 [2020-10-28 14:33:02,555 INFO L226 Difference]: Without dead ends: 604 [2020-10-28 14:33:02,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:33:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-28 14:33:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 449. [2020-10-28 14:33:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-28 14:33:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 575 transitions. [2020-10-28 14:33:02,660 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 575 transitions. Word has length 51 [2020-10-28 14:33:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:02,660 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 575 transitions. [2020-10-28 14:33:02,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:33:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 575 transitions. [2020-10-28 14:33:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:33:02,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:02,662 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-10-28 14:33:02,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:33:02,663 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1138046916, now seen corresponding path program 5 times [2020-10-28 14:33:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767834306] [2020-10-28 14:33:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:02,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:03,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:05,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:06,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:07,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:08,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:08,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:33:08,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:33:08,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5224 [2020-10-28 14:33:08,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:08,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:33:08,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:08,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:08,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:08,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:08,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:08,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:08,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:08,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:08,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:08,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:08,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:08,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:08,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:08,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767834306] [2020-10-28 14:33:08,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:08,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:08,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342262758] [2020-10-28 14:33:08,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:08,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:08,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:08,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:08,589 INFO L87 Difference]: Start difference. First operand 449 states and 575 transitions. Second operand 15 states. [2020-10-28 14:33:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:10,119 INFO L93 Difference]: Finished difference Result 699 states and 896 transitions. [2020-10-28 14:33:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:33:10,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-28 14:33:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:10,123 INFO L225 Difference]: With dead ends: 699 [2020-10-28 14:33:10,124 INFO L226 Difference]: Without dead ends: 662 [2020-10-28 14:33:10,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:33:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-10-28 14:33:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 509. [2020-10-28 14:33:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-28 14:33:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 654 transitions. [2020-10-28 14:33:10,268 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 654 transitions. Word has length 51 [2020-10-28 14:33:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:10,269 INFO L481 AbstractCegarLoop]: Abstraction has 509 states and 654 transitions. [2020-10-28 14:33:10,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 654 transitions. [2020-10-28 14:33:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:33:10,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:10,271 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:10,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:33:10,271 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:10,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1402951033, now seen corresponding path program 3 times [2020-10-28 14:33:10,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:10,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145636525] [2020-10-28 14:33:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:10,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:11,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:12,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:14,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:15,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:15,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:33:15,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:33:15,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 14:33:15,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:15,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:15,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:15,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:15,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:33:15,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:15,786 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-28 14:33:16,016 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-28 14:33:16,280 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-28 14:33:16,445 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 14:33:16,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:16,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:16,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:16,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:16,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:16,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:33:16,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:16,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:16,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145636525] [2020-10-28 14:33:16,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:16,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:16,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092682097] [2020-10-28 14:33:16,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:16,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:16,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:16,935 INFO L87 Difference]: Start difference. First operand 509 states and 654 transitions. Second operand 15 states. [2020-10-28 14:33:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:19,371 INFO L93 Difference]: Finished difference Result 809 states and 1022 transitions. [2020-10-28 14:33:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:33:19,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-28 14:33:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:19,376 INFO L225 Difference]: With dead ends: 809 [2020-10-28 14:33:19,376 INFO L226 Difference]: Without dead ends: 780 [2020-10-28 14:33:19,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:33:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-28 14:33:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 549. [2020-10-28 14:33:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-10-28 14:33:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 707 transitions. [2020-10-28 14:33:19,517 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 707 transitions. Word has length 52 [2020-10-28 14:33:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:19,518 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 707 transitions. [2020-10-28 14:33:19,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 707 transitions. [2020-10-28 14:33:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:33:19,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:19,520 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:19,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:33:19,520 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:19,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2049600777, now seen corresponding path program 4 times [2020-10-28 14:33:19,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:19,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188812398] [2020-10-28 14:33:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:19,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking...